Guess what, "default" is not my default profile. That would be "default-release".
Can I delete "default"? What's the reason for the double profile?
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I found the answer at Is the 'default-release' profile a bug or the new profile name for Firefox 67 upwards and still being phased in?.
Summary of that page
Firefox can't share profiles between separate installs since v67.
The two profiles, .default and .default-release, are used by installs from different update channels - like release, beta, nightly, developer-edition, etc. So for a non-tech user, .default-release is the "normal" default, since it is dedicated to the "normal" Release channel.
Older version of Firefox used .default in place of .default-release, so if you have both it's probably because you have first installed Firefox before v67. The old .default profile was converted and copied to .default-release when you updated to Firefox 67.
Peter Mortensen
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juanriccio
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Thunderbird didnt migrate successfully when ugrading Ubuntu to 24.04. Tried various solutions including replacing the .thunderbird folder
$ cp -r ~/.thunderbird ~/snap/thunderbird/common/
I found out this did not work as xxx.default profile was not used in the previous version of Thunderbird and instead XXXX.default-release was used but in new version xxxxxx.default was created everytime a new account profile was created.
The solution was to rename xxxxxx.default-release to xxxxxx.default
Ensure the names of files are the same as what Thunderbird is using
Toto
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