If you have run into a problem, or several problems – I would highly suggest that you reset it. The reset Firefox feature can fix a lot of issues by resetting Firefox back to the day it was installed while also saving all the information you need to save.
So how do you reset Firefox to the default state? Click on the Firefox button at the top of the browser, and then go over to the sub-menu labeled, “Help”. Next, select Troubleshooting Information.
If you look towards the far right of the Troubleshooting Information window, you should see a button that reads, “Reset Firefox”. Hit the button in question, and Firefox will be reset. Here are the details that will be saved from your Firefox install:
- Browsing history
- Web form auto-fill information
Of course, you should also know about the thing that are not restored: Extensions, themes, open tabs and site specific preferences and other customizations. It is nice that Firefox comes with such a feature, because this makes it really simple to get Firefox reset to a state when it was working correctly.