Even after clean install, Firefox v. 44 launches but does not display windows on MacBook running OS X 10.10.5.
The browser worked once as normal and after closing and reopening would no longer display windows or preferences or any other important components. It would show history, etc. from the application menu bar but not display the selected page. This also happened with the previous version. But it worked more than once after a clean install. Note, this version and previous versions work fine on iMac running the same system.
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https://support.mozilla.org/en-US/kb/update-firefox-latest-version 44.*
Some problems occurs when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;
- Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
- Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see
Configure firewalls so that Firefox can access the Internet. {web link}