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I reinstalled Ubuntu 11.10 the other day and now when I try to install the Lightning extension in Thunderbird it states: Lightning is not compatible with Thunderbird 7.0.1.

As extra information lightning is not comming up automaticly when searching for it within Thunderbird. You need to download it manually.

And also I had it installed before I reformated the computer.

Anybody has a solution to this issue?

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have you tried this ? ->… – hhlp Nov 10 '11 at 14:29
Ubuntu 11.10 now has Thunderbird 8.x available, from ppa:mozillateam/thunderbird-stable. This does support Lightning 1.0, so can issue now be closed? – david6 Nov 29 '11 at 2:25
New Ubuntu 11.10 install has Thunderbird 9.0 and says Lightning is not compatible with this version. – James Feb 2 '12 at 23:38

I'd suggest making sure you're using the version in the Ubuntu archive instead of the version from The package is called xul-ext-lightning (Click to install). We keep lightning updated with Thunderbird.

There will be an upgrade to 8 early next week that should come with a new compatible lightning as well. Also, the version in the Ubuntu archive is architecture specific as opposed to which is i386 (32 bit) only.

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Can you add the link, you mention? – david6 Nov 22 '11 at 20:17

I also had this problems short after a new Thunderbird version came out. The solution is, to wait with installing the newest version of thunderbird only, when all the extensions are also available in a compatible version.

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The latest Lightning 1.0 only works with Thunderbird 8.0. For Thunderbird 7, download Lightning 1.0b7 from here:

That is the only version that works with Thunderbird 7 so make sure you don't download some other version. Once downloaded, in Thunderbird open "Addons", click the icon on the left of "Search all add-ons" and select "Install Add-on from file", browse for the downloaded Lightning 1.0b7 .xpi and you're done.

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This method is not currently working. – david6 Nov 22 '11 at 21:05

Looks like the package as of today has no "-extension" in its name. This worked for me:

sudo apt-get install xul-ext-lightning

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