Suddenly, my Thunderbird and Firefox won't run because of this message:

Your Thunderbird profile cannot be loaded. It may be missing or inaccessible.
Your Firefox profile cannot be loaded. It may be missing or inaccessible.

Even running firefox/thunderbird --ProfileManager ends with the same error

I'm on Arch Linux, latest packages. Tried also downgrading FF & TB - just in case. Apps stopped working after latest reboot (no system upgrade was done, just one app).

I can run TB and FF as root. My old profiles are commented out like .mozilla_ and .thunderbird_ so if I run FF it should create new .mozilla folder. Folder is successfully created but it is empty - no new profile folder nor profiles.ini file.

This is an example of freshly created .thunderbird directory in my Home

e@arch ~ $ l | grep thunderbird
drwx------  2 e    users     4096 Jan  2 22:17 .thunderbird

I tried to chmod .thunderbird to 777 with no luck. It looks to me like a permission problem. What should I look for? What is wrong?

1 Answer 1


Okay, so I found what was going on.. .cache directory in my /home/e was corrupted so I deleted it and voila.. all is going as it should. Sorry for bothering :)

  • Your answer saved me a lot of hours, was going nuts from yesterday night! Thanks!
    – Tahir Raza
    Commented Jul 23, 2020 at 15:55

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