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Add-on for administering user scripts in Google Chrome. Includes an editor with syntax highlighting, a script search for the currently displayed pages, compatibility options for Greasemonkey scripts, and other functionality.

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Plug-in for watching Flash animations online. Can also play MPEG-4 AVC (H.264) and High Efficiency AAC (HE-AAC) files.

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Browser add-on that locates former Facebook friends who have unfriended you or deleted their accounts. Also displays all past and open friendship requests you’ve made; requires Greasemonkey. Violated Facebook's terms and has therefore been withdrawn.

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User profile for the Firefox web browser, optimised for secure anonymous surfing. The profile has been designed for use with the JonDo anonymisation program, but can also be used with other services such as TOR or standalone.

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Browser extension. Allows running web applications in offline mode, if the websites are designed for Google Gears. Current beta version is primarily aimed at developers.

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Checks whether the plug-ins installed in Firefox are up-to-date, advises when a plug-in is outdated and provides a link to download a new version.

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Add-on for the Firefox browser for simultaneously using several accounts in the same web service. You can use the context menu to open a new browser window in which you can log on to the particular web service with a different account while continuing to work in the original window, using the account that is already logged on.

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Firefox and Google Chrome add-on that provides a bar with web developer tools. Can display the size and outlines of various page elements, hide images, display CSS changes and much more. Also available for the Flock and [PRG,SeaMonkey] browsers. Fast and secure download from The H

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Firefox add-on which allows the user to add, edit and filter HTTP request headers.

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Adds an entry to the File menu in Firefox that enables you to save a web site locally in PDF format.

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Firefox and Chrome upgrade that sets up only encrypted connections (HTTPS) to web sites. The Chrome add-on is currently available only as a beta version for testing purposes.

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Firefox add-on that generates a range of video formats like Theora and VP8/WebM.

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Expansion pack for Firefox, Google Chrome, Internet Explorer, Safari and Opera which allows safe surfing by providing information about the trustworthiness of a web site about to be accessed.

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Works as an Firefox, Google Chrome and Safari add-on and displays messages in RSS feeds in a newspaper layout. Also available as an iPhone app and as an Android version.

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Add-on for Firefox that provides support for bids in eBay auctions. Enables you to make bids with split-second accuracy and administer auctions in groups. Uses SMS or email to send you messages and SSL to encrypt data. Requires a user account from bidbag. After the free test phase, 19 euro cents are charged for each auction that is won. Fast and secure download from The H

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Enhanced version of Firefox, with which the user can save embedded and linked content on the open web page onto the hard drive.

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An extension for Seamonkey, Firefox and Netscape. Replaces flash content with placeholders. Clicking on a placeholder opens the intended flask object.

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Firefox extension that uses JavaScript browser programs to change the appearance of web sites in almost any way.

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Browser extension for Firefox, Thunderbird and SeaMonkey, Firefox Mobile, Google Chrome and Opera which blocks ads on web sites. Ads can be blocked by clicking on the content or by entering ad URLs (regular phrases can also be entered). Also hides Facebook social plugins. Fast and secure download from The H

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Updates open Firefox tabs and windows at regular intervals.

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