[Bug 1797945] Re: Lightning incompatible with Thunderbird 60.2.1

[Jeffery To]

@Adrian Limmi:

1. Open the Add-ons Manager in Thunderbird, and go to the Extensions page/tab (if it isn't already open).
2. At the top of the page, click the gear button next to the search box to open a menu, then select "Install Add-on From File".
3. From here you can select the .xpi file and it should install without issue.

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https://bugs.launchpad.net/bugs/1797945

Title:
  Lightning incompatible with Thunderbird 60.2.1

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