If you are using Windows 10 (1809), go (in windows) to All Settings/Apps/Default Apps and ensure that your favorite browser is listed as default.
Thank you but I am using Windows 7
This will show you haow:
https://www.google.com/search?q=set+default+browser+in+windows+7&rlz=1C1SQJL_enUS783US783&oq…