The Firefox web browser supports hundreds of extensions in its latest version. There are extensions that tweak its behavior in small but useful ways, addons that add completely new and very innovative features, even entire applications like FTP clients and e-mail posting programs that run inside the browser.
It would be silly to list all the extensions supported by Firefox here. There are some extensions, however, which I consider vastly more useful than all the others. These are usually the first things I add to every new Firefox installation before using it for browsing web pages. This is a list of these extensions:
It’s All Text! — https://addons.mozilla.org/en-US/firefox/addon/4125
Open in Browser — https://addons.mozilla.org/en-US/firefox/addon/8207
A “convenience extension”, the Open in Browser addon adds an extra option to the open dialog that Firefox pops up when it cannot render a web object inside the browser window. Some web sites report a rather conservative MIME type for the objects they serve, commonly reporting that an object is a raw byte stream, even if the object itself is the source code of a script. In these cases, the Open in Browser extension enables Firefox to temporarily ignore the MIME type reported by the web server, and display the web object directly inside the browser window; saving you from the trouble of storing a local disk copy and manually launching an external viewer.
Video Download Helper — https://addons.mozilla.org/en-US/firefox/addon/3006
A handy extension that lets you download video clips from YouTube and other web sites that require a Flash plugin. This Firefox extension makes it possible to locally store the video files, so that they can be played later with MPlayer, Totem, VLC, or other media players. Having the entire media files locally often results in improved playback, as the media player does not have to block video output, waiting for input from a slow network connection.
These are the four Firefox extensions that I install to all my Firefox profiles. I can probably browse most web sites without them, with a few annoying parts here and a few missing conveniences there, but whenever I have the option these addons are definitely part of my browsing tools.
Which extensions do you like using? Which ones are those Firefox addons that you “cannot live without”?