It should not slow you down any in real terms, and may actually help - speed things up since ads, banners and other junk are not being displayed. - The actual processing time required by Privoxy - itself for each page, is relatively small in the overall scheme of things, - and happens very quickly. This is typically more than offset by time saved - not downloading and rendering ad images.
"Filtering" via the filterfile - mechanism may cause a perceived slowdown, since the entire page is buffered - before displaying. See below.
Using the default filtering configuration, I noticed considerable delays in -page requests compared to the old Junkbuster. Loading pages with large contents -seemed to take forever, then suddenly delivering all the content at once. -
The whole content must be loaded in order to filter, and nothing is is -sent to the browser during this time. The loading time does not really -change in real numbers, but the feeling is different, because most -browsers are able to start rendering incomplete content, giving the -user a feeling of "it works". -
To modify the content of a page (i.e. make frames resizeable again, etc.) and -not just replace ads, Privoxy needs to download the -entire page first, do its content magic and then send the page to the browser.
Since Privoxy sits between your web browser and the Internet, it can be -programmed to handle certain pages specially.
With recent versions of Privoxy (version 2.9.x and - greater), you can get some information about - Privoxy and change some settings by going to - http://p.p/ or, equivalently, http://config.privoxy.org/ (Note - that p.p is far easier to type but may not work in some configurations. With - the name change to Privoxy, this is changed from - the previous http://i.j.b/ and earlier 2.9.x versions).
These pages are not forwarded to a server on the - Internet - instead they are handled by a special web server which is built in to - Privoxy.
If you are not running Privoxy, then http://p.p/ will fail, and http://config.privoxy.org/ will - return a web page telling you you're not running - Privoxy.
If you have version 2.0.2, then the equivalent is - http://example.com/show-proxy-args (but you get far less information, and - you should really consider upgrading to 2.9.14).
No, not by this name. The format of the blocklists has changed - significantly in versions 2.9.x and later. This functionality - is done by the "actions" file now. See next question ...
Please see the Contact section.
This process does not work with earlier versions of Privoxy - or Junkbuster.
You cannot hide your IP address with Privoxy or any other software, since -the server needs to know your IP address to send the answers back to you.
Fortunately there are many publicly usable anonymous proxies out there, which -solve the problem by providing a further level of indirection between you and -the web server, shared by many people and thus letting your requests "drown" -in white noise of unrelated requests as far as user tracking is concerned.
Most of them will, however, log your IP address and make it available to the -authorities in case you abuse that anonymity for criminal purposes. In fact -you can't even rule out that some of them only exist to *collect* information -on (those suspicious) people with a more than average preference for privacy.
You can find a list of anonymous public proxies at multiproxy.org and many -more through Google.
No. Your chances of remaining anonymous are greatly improved, but unless you - are an expert on Internet security it would be safest to assume that - everything you do on the Web can be traced back to you.
Privoxy can remove various information about you, - and allows you more freedom to decide which sites - you can trust, and what details you want to reveal. But it's still possible - that web sites can find out who you are. Here's one way this can happen.
A few browsers disclose the user's email address in certain situations, such - as when transferring a file by FTP. Privoxy - does not filter FTP. If you need this feature, or are concerned about the - mail handler of your browser disclosing your email address, you might - consider products such as NSClean.
Browsers available only as binaries could use non-standard headers to give - out any information they can have access to: see the manufacturer's license - agreement. It's impossible to anticipate and prevent every breach of privacy - that might occur. The professionally paranoid prefer browsers available as - source code, because anticipating their behavior is easier. Trust the source, - Luke!
Definitely. More and more sites use HTTP header content to decide what to - display and how to display it. There is many ways that this can be handled, - so having hard and fast rules, is tricky.
"USER AGENT" in particular is often used in this way to identify - the browser, and adjust content accordingly. Changing this now is not - recommended, since so many sites do look for this. You may get undesirable - results by changing this.
For instance, different browsers use different encodings of Russian and Czech - characters, certain web servers convert pages on-the-fly according to the - User Agent header. Giving a "User Agent" with the wrong - operating system or browser manufacturer causes some sites in these languages - to be garbled; Surfers to Eastern European sites should change it to - something closer. And then some page access counters work by looking at the - "REFERER" header; they may fail or break if unavailable. The - weather maps of Intellicast have been blocked by their server when no - "REFERER" or cookie is provided, is another example. There are - many, many other ways things can go wrong when trying to fool a web server.
If you have problems with a site, you will have to adjust your configuration - accordingly. Cookies are probably the most likely adjustment that may - be required, but by no means the only one.
No, it does not have this ability at all. You want something like - Squid for this. And, yes, - before you ask, Privoxy can co-exist - with other kinds of proxies like Squid.
Not in the way you mean, or in the way a true firewall can, or a proxy that - has this specific capability. Privoxy can help - protect your privacy, but not really protect you from intrusion attempts.
This is not a font problem. The logo is an image that is created by - Privoxy on the fly. So as to not waste - memory, the image is rather small. The blockiness comes when the - image is scaled to fill a largish area. There is not much to be done - about this, other than to use one of the other - "imageblock" directives: pattern, - blank, or a URL of your choosing.
Given the above problem, we have decided to remove the logo option entirely -[as of v2.9.13].
It would be easy enough to just eliminate this space altogether, rather than - fill it with blank space. But, this would create problems with many pages - that use the overall size of the ad to help organize the page layout and - position the various components of the page where they were intended to be. - It is best left this way.
This is a limitation since HTTPS transactions are encrypted SSL sessions - between your browser and the secure site, and are meant to be reliably - secure and private. This means that all cookies and HTTP - header information are also encrypted from the time they leave your browser, - to the site, and vice versa. Privoxy does not - try to unencrypt this information, so it just passes through as is. - Privoxy can still catch images and ads that - are embedded in the SSL stream though.
There are no known exploits that might effect - Privoxy. On Unix-like systems, - Privoxy can run as a non-privileged - user, which is how we recommend it be run. Also, by default - Privoxy only listens to requests - from "localhost". The server aspect of - Privoxy is not itself directly exposed to the - Internet in this configuration. If you want to have - Privoxy serve as a LAN proxy, this will have to - be opened up to allow for LAN requests. In this case, we'd recommend - you specify only the LAN gateway address, e.g. 192.168.1.1, in the main - Privoxy config file. All LAN hosts can then use - this as their proxy address in the browser proxy configuration. In this way, - Privoxy will not listen on any external ports. - Of course, a firewall is always good too. Better safe than sorry.
The easiest way is to access Privoxy with your - browser by using the special URL: http://p.p/ - and select "Toggle Privoxy on or off" from that page.
Other references and sites of interest to Privoxy - users:
| http://www.privoxy.org/, - The Privoxy Home page. - |
| http://sourceforge.net/projects/ijbswa, - the Project Page for Privoxy on - Sourceforge. - |
| http://p.p/, access - Privoxy from your browser. Alternately, - http://config.privoxy.org - may work in some situations where the first does not. - |
| http://p.p/, and select "actions file feedback system" - to submit "misses" to the developers. - |
| http://www.junkbusters.com/ht/en/cookies.html - |
| http://www.waldherr.org/junkbuster/ - |
| http://privacy.net/analyze/ - |
| http://www.squid-cache.org/ - |
How much of an impact depends on many things, including the CPU of + the host system, how aggressive the configuration is, which specific + actions are being triggered, the size of the page, the bandwidth of the + connection, etc.
+ +Overall, it should not slow you down any in real terms, and may + actually help speed things up since ads, banners and other junk are not + typically being retrieved and displayed. The actual processing time + required by Privoxy itself for each + page, is relatively small in the overall scheme of things, and happens + very quickly. This is typically more than offset by time saved not + downloading and rendering ad images and other junk content (if ad + blocking is being used).
+ +"Filtering" content via the filter or deanimate-gifs actions may cause a perceived slowdown, + since the entire document needs to be buffered before displaying. And + on very large documents, filtering may have some measurable impact. How + much depends on the page size, the actual definition of the filter(s), + etc. See below. Most other actions have little to no impact on + speed.
+ +Also, when filtering is enabled but zlib support isn't available, + compression is often disabled (see prevent-compression). This can have an impact on speed as + well, although it's probably smaller than you might think. Again, the + page size, etc. will determine how much of an impact.
+If you use any filter + action, such as filtering banners by size, web-bugs etc, or the + deanimate-gifs action, the entire document must be + loaded into memory in order for the filtering mechanism to work, and + nothing is sent to the browser during this time.
+ +The loading time typically does not really change much in real + numbers, but the feeling is different, because most browsers are able + to start rendering incomplete content, giving the user a feeling of "it + works". This effect is more noticeable on slower dialup connections. + Extremely large documents may have some impact on the time to load the + page where there is filtering being done. But overall, the difference + should be very minimal. If there is a big impact, then probably some + other situation is contributing (like anti-virus software).
+ +Filtering is automatically disabled for inappropriate MIME types. + But note that if the web server mis-reports the MIME type, then content + that should not be filtered, could be. Privoxy only knows how to differentiate filterable + content because of the MIME type as reported by the server, or because + of some configuration setting that enables/disables filtering.
+http://config.privoxy.org/ is the address of Privoxy's built-in user interface, and http://p.p/ is a shortcut for it.
+ +Since Privoxy sits between your web + browser and the Internet, it can simply intercept requests for these + addresses and answer them with its built-in "web + server".
+ +This also makes for a good test for your browser configuration: If + entering the URL http://config.privoxy.org/ takes you to a page saying + "This is Privoxy ...", everything is OK. If + you get a page saying "Privoxy is not + working" instead, then your browser didn't use Privoxy for the request, hence it could not be + intercepted, and you have accessed the real web site at config.privoxy.org.
+ +Note that config.privoxy.org resolves to a public IP address. If you + use config.privoxy.org as ping or traceroute target you will reach the + system on the Internet (Privoxy can't intercept ICMP requests). If you + want to ping the system Privoxy runs on, you should use its IP address + or local DNS name (if it has got one).
+Please see the Contact section for + various ways to interact with the developers.
+Whether such submissions are eventually included in the default.action configuration file depends on how + significant the issue is. We of course want to address any potential + problem with major, high-profile sites such as Google, Yahoo, etc. Any site + with global or regional reach, has a good chance of being a candidate. + But at the other end of the spectrum are any number of smaller, + low-profile sites such as for local clubs or schools. Since their reach + and impact are much less, they are best handled by inclusion in the + user's user.action, and thus would be + unlikely to be included.
+Rest assured that it has been read and considered. Why it is not + answered, could be for various reasons, including no one has a good + answer for it, no one has had time to yet investigate it thoroughly, it + has been reported numerous times already, or because not enough + information was provided to help us help you. Your efforts are not + wasted, and we do appreciate them.
+If you run both the browser and Privoxy locally, you cannot hide your IP address + with Privoxy or ultimately any other + software alone. The server needs to know your IP address so that it + knows where to send the responses back.
+ +There are many publicly usable "anonymous" proxies out there, which + provide a further level of indirection between you and the web + server.
+ +However, these proxies are called "anonymous" because you don't need + to authenticate, not because they would offer any real anonymity. Most + of them will log your IP address and make it available to the + authorities in case you violate the law of the country they run in. In + fact you can't even rule out that some of them only exist to *collect* + information on (those suspicious) people with a more than average + preference for privacy.
+ +If you want to hide your IP address from most adversaries, you + should consider chaining Privoxy with + Tor. The + configuration details can be found in How + do I use Privoxy together with + Tor section just below.
+No. Your chances of remaining anonymous are improved, but unless you + chain Privoxy with Tor or a similar proxy and know what you're + doing when it comes to configuring the rest of your system, you should + assume that everything you do on the Web can be traced back to you.
+ +Privoxy can remove various + information about you, and allows you more freedom to decide which sites you can + trust, and what details you want to reveal. But it neither hides your + IP address, nor can it guarantee that the rest of the system behaves + correctly. There are several possibilities how a web sites can find out + who you are, even if you are using a strict Privoxy configuration and chained it with + Tor.
+ +Most of Privoxy's privacy-enhancing + features can be easily subverted by an insecure browser configuration, + therefore you should use a browser that can be configured to only + execute code from trusted sites, and be careful which sites you trust. + For example there is no point in having Privoxy modify the User-Agent header, if websites + can get all the information they want through JavaScript, ActiveX, + Flash, Java etc.
+ +A few browsers disclose the user's email address in certain + situations, such as when transferring a file by FTP. Privoxy does not filter FTP. If you need this + feature, or are concerned about the mail handler of your browser + disclosing your email address, you might consider products such as + NSClean.
+ +Browsers available only as binaries could use non-standard headers + to give out any information they can have access to: see the + manufacturer's license agreement. It's impossible to anticipate and + prevent every breach of privacy that might occur. The professionally + paranoid prefer browsers available as source code, because anticipating + their behavior is easier. Trust the source, Luke!
+Good! Actually, they are probably testing for some other kinds of + proxies. Hiding yourself completely would require additional steps.
+Before you configure Privoxy to use + Tor, please + follow the User Manual chapters 2. Installation + and 5. Startup + to make sure Privoxy itself is setup + correctly.
+ +If it is, refer to Tor's + extensive documentation to learn how to install Tor, and make sure Tor's logfile says that "Tor + has successfully opened a circuit" and it "looks like client functionality is working".
+ +If either Tor or Privoxy isn't working, their combination most + likely will neither. Testing them on their own will also help you to + direct problem reports to the right audience. If Privoxy isn't working, don't bother the + Tor developers. If Tor isn't working, don't send bug reports to the + Privoxy Team.
+ +If you verified that Privoxy and + Tor are working, it is time to connect + them. As far as Privoxy is concerned, + Tor is just another proxy that can be + reached by socks4, socks4a and socks5. Most likely you are interested + in Tor to increase your anonymity + level, therefore you should use socks5, to make sure DNS requests are + done through Tor and thus invisible to + your local network. Using socks4a would work too, but with socks5 you + get more precise error messages.
+ +Privoxy's main configuration file + is already prepared for Tor, if you + are using a default Tor configuration + and run it on the same system as Privoxy, you just have to edit the forwarding + section and uncomment the line:
+ +
+ +# forward-socks5t / 127.0.0.1:9050 . + ++ |
+
Note that if you got Tor through one of the bundles, you may have to + change the port from 9050 to 9150 (or even another one). For details, + please check the documentation on the Tor website.
+ +This is enough to reach the Internet, but additionally you might + want to uncomment the following forward rules, to make sure your local + network is still reachable through Privoxy:
+ +
+ +# forward 192.168.*.*/ . +# forward 10.*.*.*/ . +# forward 127.*.*.*/ . + ++ |
+
Unencrypted connections to systems in these address ranges will be + as (un)secure as the local network is, but the alternative is that your + browser can't reach the network at all. Then again, that may actually + be desired and if you don't know for sure that your browser has to be + able to reach the local network, there's no reason to allow it.
+ +If you want your browser to be able to reach servers in your local + network by using their names, you will need additional exceptions that + look like this:
+ +
+ +# forward localhost/ . + ++ |
+
Save the modified configuration file and open http://config.privoxy.org/show-status in your browser, + confirm that Privoxy has reloaded its + configuration and that there are no other forward lines, unless you + know that you need them. If everything looks good, refer to Tor Faq 4.2 to learn how to verify that you are + really using Tor.
+ +Afterward, please take the time to at least skim through the rest of + Tor's documentation. Make sure you + understand what Tor does, why it is no + replacement for application level security, and why you probably don't + want to use it for unencrypted logins.
+Definitely. It is common for sites to use browser type, browser + version, HTTP header content, and various other techniques in order to + dynamically decide what to display and how to display it. What you see, + and what I see, might be very different. There are many, many ways that + this can be handled, so having hard and fast rules, is tricky.
+ +The "User-Agent" is sometimes used in + this way to identify the browser, and adjust content accordingly.
+ +Also, different browsers use different encodings of non-English + characters, certain web servers convert pages on-the-fly according to + the User Agent header. Giving a "User Agent" + with the wrong operating system or browser manufacturer causes some + sites in these languages to be garbled; Surfers to Eastern European + sites should change it to something closer. And then some page access + counters work by looking at the "Referer" + header; they may fail or break if unavailable. The weather maps of + Intellicast have been blocked by their server when no "Referer" or cookie is provided, is another example. + (But you can forge both headers without giving information away). There + are many other ways things can go wrong when trying to fool a web + server. The results of which could inadvertently cause pages to load + incorrectly, partially, or even not at all. And there may be no obvious + clues as to just what went wrong, or why. Nowhere will there be a + message that says "Turn off fast-redirects or + else! "
+ +Similar thoughts apply to modifying JavaScript, and, to a lesser + degree, HTML elements.
+ +If you have problems with a site, you will have to adjust your + configuration accordingly. Cookies are probably the most likely + adjustment that may be required, but by no means the only one.
+No, it does not have this ability at all. You want something like + Squid or + Polipo for this. And, yes, before you ask, Privoxy can co-exist with other kinds of proxies + like Squid. See the forwarding + chapter in the user manual for details.
+Not in the way you mean, or in the way some firewall vendors claim + they can. Privoxy can help protect + your privacy, but can't protect your system from intrusion attempts. It + is, of course, perfectly possible to use both.
+It is technically possible to eliminate banners and ads in a way + that frees their allocated page space. This could easily be done by + blocking with Privoxy's filters, and + eliminating the entire image references from the HTML page + source.
+ +But, this would consume considerably more CPU resources (IOW, slow + things down), would likely destroy the layout of some web pages which + rely on the banners utilizing a certain amount of page space, and might + fail in other cases, where the screen space is reserved (e.g. by HTML + tables for instance). Also, making ads and banners disappear without + any trace complicates troubleshooting, and would sooner or later be + problematic.
+ +The better alternative is to instead let them stay, and block the + resulting requests for the banners themselves as is now the case. This + leaves either empty space, or the familiar checkerboard pattern.
+ +So the developers won't support this in the default configuration, + but you can of course define appropriate filters yourself to achieve + this.
+Since secure HTTP connections are encrypted SSL sessions between + your browser and the secure site, and are meant to be reliably + secure, there is + little that Privoxy can do but hand + the raw gibberish data though from one end to the other + unprocessed.
+ +The only exception to this is blocking by host patterns, as the + client needs to tell Privoxy the name + of the remote server, so that Privoxy + can establish the connection. If that name matches a host-only pattern, + the connection will be blocked.
+ +As far as ad blocking is concerned, this is less of a restriction + than it may seem, since ad sources are often identifiable by the host + name, and often the banners to be placed in an encrypted page come + unencrypted nonetheless for efficiency reasons, which exposes them to + the full power of Privoxy's ad + blocking.
+ +"Content cookies" (those that are + embedded in the actual HTML or JS page content, see filter{content-cookies}), in an SSL transaction will be + impossible to block under these conditions. Fortunately, this does not + seem to be a very common scenario since most cookies come by + traditional means.
+On Unix-like systems, Privoxy can + run as a non-privileged user, which is how we recommend it be run. + Also, by default Privoxy listens to + requests from "localhost" only.
+ +The server aspect of Privoxy is not + itself directly exposed to the Internet in this configuration. If you + want to have Privoxy serve as a LAN + proxy, this will have to be opened up to allow for LAN requests. In + this case, we'd recommend you specify only the LAN gateway address, + e.g. 192.168.1.1, in the main Privoxy + configuration file and check all access + control and security options. All LAN hosts can then use this as + their proxy address in the browser proxy configuration, but + Privoxy will not listen on any + external interfaces. ACLs can be defined in addition, and using a + firewall is always good too. Better safe than sorry.
+Privoxy doesn't have a transparent + proxy mode, but you can toggle off blocking and content filtering.
+ +The easiest way to do that is to point your browser to the remote + toggle URL: http://config.privoxy.org/toggle.
+ +See the Bookmarklets section of the User + Manual for an easy way to access this feature. Note that this is a + feature that may need to be enabled in the main config file.
+No, this just means all optional filtering and actions are disabled. + Privoxy is still acting as a proxy, + but just doing less of the things that Privoxy would normally be expected to do. It is + still a "middle-man" in the interaction + between your browser and web sites. See below to bypass the proxy.
+Bypassing a proxy, or proxying based on arbitrary criteria, is + purely a browser configuration issue, not a Privoxy issue. Modern browsers typically do have + settings for not proxying certain sites. Check your browser's help + files.
+A "crunch" simply means Privoxy intercepted something, nothing more. + Often this is indeed ads or banners, but Privoxy uses the same mechanism for trapping + requests for its own internal pages. For instance, a request for + Privoxy's configuration page at: + http://config.privoxy.org, is intercepted (i.e. it does not + go out to the 'net), and the familiar CGI configuration is returned to + the browser, and the log consequently will show a "crunch".
+ +Since version 3.0.7, Privoxy will also log the crunch reason. If you + are using an older version you might want to upgrade.
+From the webserver's perspective, there is no difference between + viewing a document (i.e. a page), and downloading a file. The same is + true of Privoxy. If there is a match + for a block + pattern, it will still be blocked, and of course this is obvious.
+ +Filtering is potentially more of a concern since the results are not + always so obvious, and the effects of filtering are there whether the + file is simply viewed, or downloaded. And potentially whether the + content is some obnoxious advertisement, or Mr. Jimmy's latest/greatest + source code jewel. Of course, one of these presumably is "bad" content that we don't want, and the other is + "good" content that we do want. Privoxy is blind to the differences, and can only + distinguish "good from bad" by the + configuration parameters we give it.
+ +Privoxy knows the differences in + files according to the "Content Type" as + reported by the webserver. If this is reported accurately (e.g. + "application/zip" for a zip archive), then + Privoxy knows to ignore these where + appropriate. Privoxy potentially can + filter HTML as well as plain text documents, subject to configuration + parameters of course. Also, documents that are of an unknown type + (generally assumed to be "text/plain") can + be filtered, as will those that might be incorrectly reported by the + webserver. If such a file is a downloaded file that is intended to be + saved to disk, then any content that might have been altered by + filtering, will be saved too, for these (probably rare) cases.
+ +Note that versions later than 3.0.2 do NOT filter document types + reported as "text/plain". Prior to this, + Privoxy did filter this document + type.
+ +In short, filtering is "ON" if a) the + content type as reported by the webserver is appropriate and b) the configuration + allows it (or at least does not disallow it). That's it. There is no + magic cookie anywhere to say this is "good" + and this is "bad". It's the configuration + that lets it all happen or not.
+ +If you download text files, you probably do not want these to be + filtered, particularly if the content is source code, or other critical + content. Source code sometimes might be mistaken for Javascript (i.e. + the kind that might open a pop-up window). It is recommended to turn + off filtering for download sites (particularly if the content may be + plain text files and you are using version 3.0.2 or earlier) in your + user.action file. And also, for any site or + page where making any changes at all to the content is to be + avoided.
+ +Privoxy does not do FTP at all, + only HTTP and HTTPS (SSL) protocols.
+Please read above.
+One time-tested technique to defeat common ads is to trick the local + DNS system by giving a phony IP address for the ad generator in the + local HOSTS file, typically using 127.0.0.1, aka localhost. This + effectively blocks the ad.
+ +There is no reason to use this technique in conjunction with + Privoxy. Privoxy does essentially the same thing, much more + elegantly and with much more flexibility. A large HOSTS file, in fact, not only duplicates effort, but + may get in the way and seriously slow down your system. It is + recommended to remove such entries from your HOSTS file. If you think your hosts list is neglected + by Privoxy's configuration, consider + adding your list to your user.action + file:
+ +
+
+ { +block }
+ www.ad.example1.com
+ ad.example2.com
+ ads.galore.example.com
+ etc.example.com
+
+ |
+
Other references and sites of interest to Privoxy users:
+ +| https://www.privoxy.org/, the Privoxy Home page. | +
| https://www.privoxy.org/faq/, the Privoxy FAQ. | +
| https://www.privoxy.org/developer-manual/, the + Privoxy developer manual. | +
| https://sourceforge.net/projects/ijbswa/, the Project + Page for Privoxy on SourceForge. | +
| http://config.privoxy.org/, the web-based user + interface. Privoxy must be + running for this to work. Shortcut: http://p.p/ | +
| https://sourceforge.net/tracker/?group_id=11118&atid=460288, + to submit "misses" and other + configuration related suggestions to the developers. | +
| http://www.squid-cache.org/, a popular caching proxy, + which is often used together with Privoxy. | +
| http://www.pps.univ-paris-diderot.fr/~jch/software/polipo/, + Polipo is a caching proxy with + advanced features like pipelining, multiplexing and caching of + partial instances. In many setups it can be used as Squid replacement. | +
| https://www.torproject.org/, Tor can help anonymize web browsing, web + publishing, instant messaging, IRC, SSH, and other + applications. | +
We're not. The text substitutions that you are seeing are disabled + in the default configuration as shipped. You have either manually + activated the "fun" + filter which is clearly labeled "Text replacements + for subversive browsing fun!" or you are using an older Privoxy + version and have implicitly activated it by choosing the "Advanced" profile in the web-based editor. Please + upgrade.
+Privoxy generates HTML in both its own "templates", and possibly whenever there are text + substitutions via a Privoxy filter. + While this should always conform to the HTML 4.01 specifications, it + has not been validated against this or any other standard.
+We didn't. We make Privoxy available for download, but we don't go + around installing it on other people's systems behind their back. If + you discover Privoxy running on your system and are sure you didn't + install it yourself, somebody else did. You may not even be running the + real Privoxy, but maybe something else that only pretends to be + Privoxy, or maybe something that is based on the real Privoxy, but has + been modified.
+ +Lately there have been reports of problems with some kind of + "parental control" software based on Privoxy that came preinstalled on + certain ASUS Netbooks. The problems described are inconsistent with + the behaviour of official Privoxy versions, which suggests that the + preinstalled software may contain vendor modifications that we don't + know about and thus can't debug.
+ +Privoxy's license allows vendor + modifications, but the vendor has to comply with the license, which + involves informing the user about the changes and to make the changes + available under the same license as Privoxy itself.
+ +If you are having trouble with a modified Privoxy version, please + try to talk to whoever made the modifications before reporting the + problem to us. Please also try to convince whoever made the + modifications to talk to us. If you think somebody gave you a modified + Privoxy version without complying to the license, please let us + know.
+