5.0 prerelease 69

This version fixes a problem with the context menu items "move to folder" - "copy to folder". Some deprecated interfaces (nsIRDFService) had to be removed to make this work again. Note that you will need to restart Thunderbird once to benefit of the fix (as the old version didn't "tidy up" the overwritten global functions as it should have).

As always, to install this beta version, please download the xpi file below to hard drive (right-click save as...) and then drag the downloaded file into Thunderbird 78 Add-on manager. A simple click on the link won't work as your browser may erratically think that it is a web extension (which it isn't).