Hi, sorry for that issue. Can you reproduce with the stable version? Beta channel (even if safer than nightly) may cause some troubles like this one. If you really want to use the beta channel (what I can understand) we will have to try some tricks behind about:config

done. stable version installed. even safe mode does not work

can you give us the last crash ID with the stable version to check if the error is the same?

1C1115E0-4792-4033-90A0-DDCB75658D37

https://support.mozilla.org/en-US/questions/1166314 - 3 months keeps crushing(

Some questions about your installation and your environment: - do you have installed developer tools on your system? - do you install firefox with a .dmg or do you build it?

No installer tools, simple install from downloaded .dmg

can you try with a new profile:

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Already tried today. No luck

Well, I do not have answer, I've submitted your issue to developers on Bugzilla

• Bulleted list itemhttps://bugzilla.mozilla.org/show_bug.cgi?id=1409978