TARK is a Firefox add-on that can make the bookmarks temporarily available. It does so by providing access to a new toolbar button - or several buttons - that make it possible to mark bookmarks. Bookmarks can be set to be available for up to four weeks using the Firefox add-on. Keep in mind that this is an option, it is still perfectly possible to add bookmarks the usual way which ensures that they will never expire.

Mozilla has cultivated one of the most interesting and healthiest ecosystems for extension developers around its popular Firefox browser. The problems with this, of course, is that whenever Mozilla releases a new version of Firefox, developers have to make sure that their software is compatible. For the next release of its browser, Mozilla aims to make sure that 90% of those add-ons that make up the top 95% of add-on usage will be compatible with the latest version of Firefox.

I did expect the community to get interested in extending the Private Browsing mode by developing extensions, but I didn't expect it to happen this soon! I'm happy to announce that the first Private Browsing extension has been developed by the community member Kurt Schultz! This extension adds a toolbar and a status bar button to Firefox for quick access to the Private Browsing feature, and lets you toggle a few of the underlying preferences as a bonus! Grab it while it's hot from AMO!

Private Browsing is one of the new features of Firefox which extension developers should start to handle in their extensions. The API for this new mode is quite straightforward, and easy to use. In addition, theme developers may want to style Firefox differently inside the Private Browsing mode. That is also insanely easy to do. In this article, I'm going to give you an overview of how the API works, plus with some sample code.

Reader RJ writes in with his/her perfect combination of extensions and user styles that make working with tabs easier: TabMix Plus, Locationbar² and Stylish (with a custom style). RJ explains: