Due to prior problems, I uninstalled and installed a new Firefox about a month ago. After that, I started getting error messages when I attempted to open the browser. (… (read more)
Due to prior problems, I uninstalled and installed a new Firefox about a month ago. After that, I started getting error messages when I attempted to open the browser. (See attached image.) In the past week, Firefox has had more progressive problems. It started out with just a slow loading of pages, but this became prevalent with every page I attempted to load. I tried using the Refresh option, but this only lasts for about 20 minutes. I scanned my system with Super Antispyware, Malwarebytes and Norton 360 and removed all threats found. (Then I removed Malwarebytes to lower the number of security programs on my system.)
The crashes started about 3 days ago so I went to Support and tried to follow those steps. Nothing changed in Safe Mode. Nothing improved and in fact, things got worse. When I again uninstalled Firefox, I thought I was "wiping the slate clean", but this time, it reloaded what I'd have before. (The first time I uninstalled and re-installed, the new "copy" didn't have my bookmarks. Last night, when I re-installed, all the bookmarks were there.) Additionally, now there is a tiny red vertical line on each tab that I have open. It is to the right of the X to close the tab and appears with every tab I open. Also, since this second re-install, the browser keeps crashing. Last night, it gave me more than 6 chances to submit a crash report within a half hour. This morning, in the past 2.5 hours, I have submitted 4 crash reports. If you can't fix this, I'll have to use a different browser. I know that in this time frame, when I used Edge, there was only 1 crash report and when I've used Chrome, there have been none. I would prefer to use Firefox, but not if these situations are going to continue. At the present, the image that I want to upload regarding the error message mentioned in the first paragraph has still not loaded, but I'm going to submit this. I have no idea what will happen.
P.S. When I looked at your "educated guesses", I discovered that it said my OS was Windows 7. No! It's Windows 10.