This could occur if Firefox created a new profile and imported data from Edge. However, all your normal data would be missing in that case. If that might be what happened, check to see whether you can return to your regular profile using the steps in the first section of the following article: [[Recover lost or missing Bookmarks]]. Otherwise, if you manually switch your home page and default search engine, do the changes stick or do they get overridden after either closing/restarting Firefox to shutting down/restarting Windows? * [[How to set the home page]] * [[Change your default search settings in Firefox]]