Way 2: Start Firefox in safe mode using the Shift key Then Firefox will immediately start in safe mode with all add-ons disabled. Step 5: A ”Firefox Safe Mode” dialog will open and you need to click the ”Start in Safe Mode” button. Step 4: Click the Restart button in the pop-up dialog, so Firefox will disable all add-ons and be ready to restart. Step 3: Click Restart with Add-ons Disabled in the Help menu. Step 2: Click the three-line icon in the upper right corner of the Firefox window, and then click the question mark at the bottom of the pop-up menu. Step 1: Start Firefox, if you haven’t done so. Way 1: Start Firefox in safe mode from the Help Menu Now in this post, we will show you how to start Mozilla Firefox in safe mode on Windows 10. Does firefox keep crashing at startup? Does firefox start to become sluggish? If there is something wrong with your Firefox browser, through running Firefox in safe mode you may be able to troubleshoot the problems.
