Firefox will start running, but wont open into an interactable window.
Every time I click on Firefox to open a window, the taskbar icon and task manager say that it is open, but no window appears on my screen. If I hover over the icon on the taskbar, I can see the window, and even navigate to frequent pages by right clicking, but I can't SEE any Firefox window open.
Chosen solution
Close Firefox. Open your file browser to this hidden location:
- Mac: *~/Library/Application Support/Firefox/
- Linux: *~/.mozilla/firefox/
- Windows: %AppData%\Mozilla\Firefox\
- *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\
Locate the xulstore.json file. Then rename or delete it. Restart Firefox.
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Chosen Solution
Close Firefox. Open your file browser to this hidden location:
- Mac: *~/Library/Application Support/Firefox/
- Linux: *~/.mozilla/firefox/
- Windows: %AppData%\Mozilla\Firefox\
- *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\
Locate the xulstore.json file. Then rename or delete it. Restart Firefox.
Try to start Firefox in Safe Mode to see if that works.
- Windows: hold down the Shift key while starting Firefox
- Mac: hold down the Options key while starting Firefox