I installed the add-on "Image-Show-Hide." I quickly decided it was useless, and removed it. However, even after relaunching Firefox, my autoconfig settings didn't revert to normal. Next, I tried "Restore Defaults" via Customize Firefox. No change. So then I used the "Refresh Firefox" option, as suggested in a help article. End result, I'm still getting incomplete image display--plus, the "saved" Firefox profile on my desktop doesn't seem to be accessible.

From what I can tell, a Windows system restore would not revert my browser's autoconfig settings. I'd appreciate any help on how I can get my old Firefox back, short of completely uninstalling and reinstalling the browser.