These extensions are modified to be compatible with any version of Firefox up to but not including 4. Yes, that means these extensions are compatible with Firefox 2 and 3.

  • If you see an error "Unknown or invalid file hash type" or "Invalid file hash (possible download corruption), please right-click on these files and save them to a location on your computer. Once you've done this, you can install the add-ons by dragging them into the Tools->Add-ons window.

    This is related to a bug in Firefox - https://bugzilla.mozilla.org/show_bug.cgi?id=345505