Firefox hangs for upwards of an hour upon opening.

Re: https://support.mozilla.org/en-US/questions/1600764 . TL;DR, encountered this exact loading issue of firefox responding and after using a profile blamed it on a patience issue. I assumed so because my longest hang time would end up being ten minutes, which was the first time, never got past 5 minutes afterwards. Fast forward to now, it has been a few weeks since I used my pc due to general life business, so I had to turn it on, firefox opens, hang takes FIFTY MINUTES. I have also had to restart firefox several times due to missing updates and each and every hang time has taken a MINIMUM half an hour, and this is before giving up and closing the window on many instances. I have been sat here trying to do anything in firefox for over five hours now. The ONLY excuse that I can make up is the main reason I'm at my pc is because it needs updates and is currently downloading updates, so that is using a lot of my disc (I'm on an HDD if that's important), however it shouldn't take nearly an HOUR to use firefox for like a minute and then take ANOTHER hour simply due to hang time. I have also checked task manager and Firefox is using very little cpu (0%-2% at most) and not a lot of ram (initial hangs were down to ~50 mb, now it's around 300). The only thing I can think of is that the issue could be with the history file being corrupted, but since I have that synced with a mobile device, i don't know what that would do, nor do I want to lose my history, but otherwise i am at a loss and need more advice.