Select some text, right-click and choose"Search image" in the menu, a Google Image tab will open with your results.
Add a link near password fields to hide or show passwords.
A context menu to open images in a new tab
Select some text, right-click and choose"Search in YouTube" in the menu, a new tab will open with the searched text.
Save current page as PDF. Very simple. No permissions, no third-party server. Uses only built-in Firefox converter. Works on Windows and Linux, not on Mac.
Open bookmarks in a new tab
Currency exchange rates in the status bar (data from Yahoo!Finance or Google on option). Display currency graphs.
Add a link in Wikipedia pages that opens new tab with related images. Results by Google images.
Checks every 404 pages. If an archive exists in archive.org, a banner is displayed to open this archive.
Easy access to French radio channels. Accès rapide et facile aux principales stations de radio françaises