Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Fullerscreen is an extension that gives Web pages in Firefox the full run of your monitor. If you spend much time using Web-based applications like Gmail, Google Notebook, or Backpack, Fullerscreen is a must-have addition to Firefox.
Firefox already has a Full Screen feature, which you can access by going to View -> Full Screen, or by pressing F11. The Fullerscreen extension extends the Web page from top to bottom and to both sides of the screen. The only intrusion by browser chrome is the scrollbar, if the page requires scrolling.
Daniel Glazman, lead engineer on the Nvu project, has been putting up builds of the Fullerscreen extension under the Mozilla Public License (MPL) on his blog and on Firefox's Add-ons site. The most recent version, as of this writing, is 0.98.
To get the extension, go to Firefox's Add-ons site, or visit Glazman's blog for the most recent builds.