Actually I don't. According to Firefox help, "private" browsing avoids saving history of pages visited, searches, cookies, etc. It also activates tracking prot

Actually I don't. According to Firefox help, "private" browsing avoids saving history of pages visited, searches, cookies, etc. It also activates tracking protection, but otherwise doesn't stop ads which is the point of using an ad blocker. IOW since I'm the only user of this device, there's not much reason to use private windows. I do have tracking protection set "on" and use ad blocking in order to make browsing the wide open internet tolerable and a bit safer.