I decided to give the Pale Moon browser a try and it seemed to work at least as well as Firefox. However, it seems like when I look at the lower left corner of the screen, it's constantly loading files from the internet, even after the web page is displayed. Occasionally, a warning window from Emsisoft or Malwarebytes will pop up and tell me that it has blocked a known attack site. Plus Pale Moon seems to insert a lot of ads inline with the text on the page. I don't like this and I wanted to get rid of Pale Moon and go back to Firefox, so I Uninstalled Pale Moon using Windows 7's Programs and Features function.
Now that it was gone, I opened my Thunderbird program and found that when I clicked a link in an email, nothing happened. The URL for the link was displayed in the lower left corner of the page, but the link never opened.
I figured that the problem might be that I had Uninstalled Pale Moon when it was still set as the Default Browser, so I went back and reinstalled Pale Moon, then made Firefox the Default Browser, then Uninstalled Pale Moon again. Links in emails still wouldn't open. Somehow or other, it seems like Pale Moon has changed something in Thunderbird such that it is always the browser that is used when opening links, even when the program is not installed on the computer. Does anyone know where I might start looking to fix this problem? I've checked every setting in Thunderbird and there doesn't seem to be any settings for which browser to use, so it must be buried in one of Thunderbird's program files.
Any assistance will be appreciated.