Facebook works fine on iPhone and iPad, and on Chrome on PC. Crashes ("Gah, your tab just crashed") when opening Facebook tab have been happening for a few days now. Also, when closing Facebook tab from Firefox, PC crashes (black screen) and reboots. Many other Firefox / Facebook crash complaints already made to Firefox, but not fixed. Pls fix urgently or I will be forced to cancel account, uninstall Firefox app and use MS Edge or Chrome as my default browser.