How-To Geek

Filter Web Content in Firefox with ProCon Latte

Looking for a way to filter web content in Firefox to help keep your family from being exposed to less than desirable content on the Internet? Now you can with the ProCon Latte extension for Firefox.

Note: If you are currently running Firefox 3.5, make certain to install version (link provided at bottom of article).

Setup & Options

Once you have downloaded and installed the extension, the best place to start is by adjusting the options for ProCon Latte to best suit you and your family’s needs.

Here you can see the General Settings. You can prevent the extension from being disabled or uninstalled, lock the “about:config” settings, enable the right click options, and set a password to protect your settings (a very good feature!).


In the Main Filter area, you can edit the Explicit Material Filter list, choose whether to allow the webpage to load before or after filtering, block all traffic, manage warning messages, redirect blocked pages, and select the level of domain control that you wish to use.


Here is a quick look at the Explicit Material Filter list Editing Window… You can filter based on keywords and keywords in website addresses (very nice!). Notice that you can also import and export lists!  We blacked out the list of words and descriptions as they are quite vulgar and not How-To Geek friendly.

Note: You will most likely want to add additional keywords to these lists by importing a keyword list.


You can also create a Whitelist of websites and domains if you want to have more control over what is accessed with Firefox.


In the Profanity Filter area, you can specify the word (or words) that profanity is to be replaced with when encountered on a website. Notice that the words in the profanity list may also be edited.  Again … the list is blacked out due to vulgarity.


A Sample of ProCon Latte in Action

For our example, we decided to do a quick search using Google with a common keyword. As you can see, ProCon Latte immediately caught the keyword and blocked the search results. It also displayed a message explaining why the search results were blocked (wonderful!).


A wonderful option if you happen to encounter a word that you would like to add to the filter is to use the mouse to highlight the word, right click on it and select “Filter word”. The following message will display to confirm the action.


If you happen to encounter an URL that you want to block access to, right click on it and select “Filter URL”. You will see the following confirmation message.



ProCon Latte is a wonderful extension that can help keep your children and family members from being exposed to the more unsavory elements on the Internet. Enjoy knowing that your family is better protected!


Download the ProCon Latte extension (Mozilla Add-ons)

Akemi Iwaya (Asian Angel) is our very own Firefox Fangirl who enjoys working with multiple browsers and loves 'old school' role-playing games. Visit her on Twitter and .

  • Published 07/22/09

Comments (6)

  1. Nigel

    I have not been able to turn pro con latte off, it blocks everything, even when I type in the word porn as in porn filter it simply shuts me down HELP, this is really annoying.

  2. Asian Angel

    @Nigel – It sounds like there is a conflict between ProCon Latte and one (or more) of your other extensions. I have had extensions conflict with each other in the past and this sounds somewhat familiar…one or more acting unusual or refusing to work.

    What you could do is start Firefox in Safe Mode, disable (or uninstall) ProCon Latte and contact the add-on creator(s) to see if they are aware of any particular extension conflicts. Hope this helps!

  3. Nic

    I need a product like this! So I installed it but then it blocks everything – even gmail! Very disappointed. Is there a different program I could use (*without paying)?

  4. tufan

    add gmail to whitelist, then it will not block it. Also add this website to white list, porn filter word will not cause the filter to block this website if you add the website to white list. It’s the best firefox extension among the filters I fave tried. FoxFilter is a good alternative but it is not free, unfortunately.

  5. Natalie

    How do I uninstall this program?

  6. Asian Angel

    @Natalie – Open your Add-ons Manager Window by going to Tools –> Addons and click Uninstall on the extension’s listing. ^_^

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