I occasionally restart Firefox using the "Restart Normally" button on the
about:profiles page and up until now it has restarted without incident.
But today, once Firefox restarted, a new tab was opened asking me if I'd like to restore my search to Bing.
The page address was
file:///C:/ProgramData/SearchRestore/restore.htm. When I installed Firefox I set my default search engine to Google. I never use Bing. I am thinking either Microsoft is really overstepping boundaries with Windows aggressively trying to get users to switch to Bing, or that this is the result of malware. It is probably the former, but my Google search did not turn up anything concrete. Is anyone familiar with this behaviour and where it originates from?
EDIT: Apparently this page is an imitation of an actual Firefox page reachable at address