After upgrading from Kubuntu 19.04 to 19.10, both Firefox and Thunderbird stopped working for me. If I attempted ...
... in both cases, I would get the message about "... using an older version ... create a new profile ....".
With Kubuntu 19.10, we're at Firefox 70, and Thunderbird 68. There was a previously reported issue "Firefox 67 thinks it's an old version and won't load my profile" with a status of "resolved wontfix".
The interesting wrinkle is my computer is a multi-boot Thinkpad, and I'm spending most of my time in (rolling release) Manjaro. So, under Manjaro, Firefox 70 opens just fine!
I found an lead in "Updating to Firefox 67 switches to a new Profile, makes users worry about old profile", May 2019, in a response by "Your Pal":
So, under Linux, I tried:
... which allows both Firefox and Thunderbird to start normally (and I don't have to repeat it every time).
I think that this is a workaround to correcting a setting somewhere ... and not a remedy going forward. Now that it's fixed, I can't replicate the original issue. Maybe if someone else gets this error, they can report back on more diagnostics.
Code:
firefox -p
thunderbird -pWith Kubuntu 19.10, we're at Firefox 70, and Thunderbird 68. There was a previously reported issue "Firefox 67 thinks it's an old version and won't load my profile" with a status of "resolved wontfix".
The interesting wrinkle is my computer is a multi-boot Thinkpad, and I'm spending most of my time in (rolling release) Manjaro. So, under Manjaro, Firefox 70 opens just fine!
I found an lead in "Updating to Firefox 67 switches to a new Profile, makes users worry about old profile", May 2019, in a response by "Your Pal":
Code:
This worked for me, thank you.
On MacOS in Terminal:
– cd to /Applications
– run “open Firefox.app –args –allow-downgrade” (without quotes)Code:
firefox -args -allow-downgrade
thunderbird -p -args -allow-downgradeI think that this is a workaround to correcting a setting somewhere ... and not a remedy going forward. Now that it's fixed, I can't replicate the original issue. Maybe if someone else gets this error, they can report back on more diagnostics.