Support Volunteers can't make changes to Firefox To submit suggestions for new or changed features, may I suggest: Feedback: https://qsurvey.mozilla.com/s3/FirefoxInput/ Possibly 2wks or so may not matter as Spring Creators Update will be released. There was in the builds that Microsoft was forcing email links or Windows programs with links to use Edge. Will see in a couple weeks. If this is a older computer running with very little ram, never any bios updates nor motherboard drivers and can no longer update your video card drivers then : https://www.tenforums.com/tutorials/26120-optimize-performance-windows-10-a.html Also be thinking soon for a replacement if it is 5yrs old or more. In which case you should probably not be running Firefox 59+ but be on the Extended Release Version 52.7.3. Please let us know if this solved your issue or if need further assistance.