Comment 28 for bug 1830096

I also experienced similar, but in my case I have my usual aarch64 client with /home on a NFS mount using ff67.
What happens is upon occasion mozilla apps (amongst others) from the server direct (using, for example, ssh -Y).

Firefox seems to change the LastOSABI in compatibility to Linux_x64_86-gcc3 from Linux_aarch64-gcc3 whereupon
the next time I launch firefox from my habitual client I get the message (like above)
> Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your
> information, create a new profile for this installation of Firefox.