Qeole

Could you please also confirm your TB version? Is it 78.4?

Ok thank you! No idea why it behaves like that though, but I'll keep investigating.

I may have a workaround. It _seems_ that changing the layout for the main window somehow fixes the add-on. To try this: `View`->`Layout`->``. You can even restore your initial layout...

Thanks for confirming! I also have to re-apply the workaround on restarting Thunderbird :(. Not much time to spend on this tonight, but still I checked the versions and v82...

@fbezdeka Assuming you meant TB 78.4 and not 74.4. Thanks a lot for your experiments! Opening the mails in a new window, even by clicking from the left panel, makes...

Minimal manifest.json, for completeness ```json { "manifest_version": 2, "applications": { "gecko": { "id": "[email protected]", "strict_min_version": "78.4.0" } }, "name": "test", "version": "1.0.0", "permissions": [ "messagesModify" ], "background": { "scripts": [...

I understand that the relevant patch is being backported to Thunderbird ESR, and the issue should be fixed for v78.6. :tada:

Great, thanks a lot for checking and confirming! I'm running with the version from thunderbird.net with automatic updates and I just got upgraded to 78.6, where the plugin works well...

@zickgraf I'm not able to reproduce on Ubuntu with v78.6.0 from thunderbird.net's binaries :confused:. Any chance you could try with the current beta or nightly version? (Use a copy of...

Ok you're right, I do reproduce with a clean profile :confused:. There _is_ some improvement with 78.6, because previously I would experience the issue on other profiles too, but this...