Allow to override TMPDIR

[rpellerin]

Why does TMPDIR have to be in ~/Downloads? It does not make sense to have temporary files in the user's Downloads folder.

Could we please have a chance to override export TMPDIR=$(xdg-user-dir DOWNLOAD)/thunderbird.tmp? Or we can have this temporary folder automatically removed after Thunderbird is closed?
Thank you.

[MarkyMarkDE]

same we have for firefox (~/Downloads/firefox.tmp) and additional thunderbird or firefox one or both writes a mesa_shader_cache folder in ~/.cache but this folders we have in our profile folders and these will be also filled!
Why we get trash on many places?
Please solve this unlogical stuff so soon as possible.

[gpelz-graph-it]

Using Thunderbird with user dirs on the network having no option to change the tmp-dir is a problem.
Before I symlinked ~/.cache to a local folder, so the cache-/tmp-dirs were not in the network, but locally. Now they are on the network which delays handling attachments&co noticeable. Having no option/way to change the location of the temp directory really is a problem.

[PimpOfSune]

Using Thunderbird with user dirs on the network having no option to change the tmp-dir is a problem.

Lack of easily accessible official non-snapd package is a problem. As per https://bugzilla.mozilla.org/show_bug.cgi?id=1925353 , junk in user's folders is a consequence of bad preferred packaging choice.

I as "just a user" am under impression that I can't install non-snapd version of Thunderbird anymore as "just a user".
So I'll probably have to migrate to a different solution.

[gpelz-graph-it]

Any update regarding an option to overwrite the location?