My firefox started to get really sluggish, crashing sometimes and CPU usage was way too high. It was at 30-55% the last time I checked. I have a Thinkpad T450s, so there shouldn't be any issues with performance and resources. The T450s got an i7, 12GB RAM and a 512GB SSD. I just uninstalled Firefox, downloaded the newest version and installed it. The first thing to greet me were my old tabs. Everything was like nothing happened! Every bookmark, the history and all cookies are still present. What happened?
Your personal information is stored within the following location:
When you remove and reinstall Firefox, those files and folders with your profile settings are left intact. Although you actually did successfully replace the Firefox program files, the things that you see are still retained within your Windows user profile.
I saw the same thing happen when the 64-bit version of Firefox was first released. I removed the 32-bit version of Firefox from my Windows 10 Pro x64 machine, and when I installed the 64-bit version of Mozilla's browser it made for a very smooth transition. The following information was still there:
- Browsing and download history
- Open windows and tabs
- Web form auto-fill information
- Personal dictionary
For future reference, should you need to do this again it would probably be a bit faster and easier to utilize the built-in Refresh Firefox feature, instead. In your Firefox address bar enter
about:support and then select the
Refresh Firefox button on the upper-right: