pop-up does not show (though shortcut seems to be registered) about quickmove-extension HOT 6 CLOSED

Hmm. Can you try uninstalling and re-installing the add-on? I'm not really sure how to solve the first error message, this error is from somewhere within the Thunderbird/Firefox extensions code. The second error sounds like filename case-sensitivity that I thought I had fixed with 2.7.0

from quickmove-extension.

Just unistalling and installing the add-on did not work. But when I disabled all other add-ons, it worked. Subsequently, I enabled my other add-ons one-by-one. And then the QuickMove add-on kept on working. It's unclear to me how this would work, but apparently there is some interaction between the add-ons that depends on the order in which they have been installed/enabled.
For me the issue has been solved now .... I thought.

After a few successful moves, I'm back at the non-functioning behaviour -> the pop-up does not appear.

from quickmove-extension.

Can you try 2.8.1 maybe? It will be reviewed and released shortly, otherwise you can grab the .xpi file from the github release.

from quickmove-extension.

It looks like we haven't heard back on this issue, therefore we are closing this issue. If this problem persists in the latest version of Thunderbird and the Quick Folder Move extension, please re-open this issue.

from quickmove-extension.

Indeed, it seems to work in a stable way now. Thanks!

from quickmove-extension.