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Firefox bounces in Dock once and won't open

  • 5 replies
  • 1 has this problem
  • Last reply by js641

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I have macOS Mojave, and to my recollection Firefox worked a month or so ago. Now, it bounces in the Dock once, looks like it tries to open, and then quits. I've tried changing profiles, looking for fbplugin issues, reinstalling, deleting settings from Application Support folders, and nothing fixes this problem. Any thoughts, y'all?

All Replies (5)

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Are you using the Mac beta?

I suspect you have the same problem as

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I'm actually not using the Mac beta. I'm using the current version of Mojave, but not the beta :/

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I uninstalled Firefox, restarted my computer, and reinstalled Firefox. When I tried to open it, it bounced in the dock long enough for macOS to ask me if I was sure I wanted to open it. Once I clicked open, it just closed. No error message, no crash dialogue, nothing. Now when I try to open it it's back to bouncing once and disappearing.

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I called for more help.

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Thanks. The only other thing I can think of is I had been using an extension called Myki, and maybe that caused an issue? I thought I went in and deleted a lot of the Application Support files, but maybe Myki is stored somewhere else and causing an issue.