Settings now use the extensions prefix. Users may need to re-enter the settings (sorry about this).
Refactored a few depreciated code.
Now runs with E10S enabled. This actually needs a lot more work (patches are welcome), but for now it will at least run with E10S enabled using compatibility shims.
This Firefox add-on is a work-around to prevent...
Error: preview is undefined
Source: resource://gre/modules/WindowsPreviewPerTab.jsm
...messages that litter the Error Console in Firefox 3/4/5 + Windows 7 when the last tab is closed (and closing last tab is enabled in the settings). Be aware that this disables Firefox's AeroPeek features.
Download
Again, this is a work-around, not a real fix. I assume it will be fixed in Firefox 6.