I have recently started experiencing browser crashes regarding use of webm video usage on web sites. Visiting any site that uses webm video will crash Firefox. I don't know when exactly this started, but I noticed it happening today. It had to have been fairly recent. I checked the same sites in another browser (Google Chrome) and they work fine. I'm curious if it might be related to Firefox itself. An example would be to visit this site here: http://www.webmfiles.org/demo-files/ You can also test on rule34hentai.net/post/list/lightning/1 Be warned, site has mature content and there's often lots of popups there. However, I've never been infected by any malware from them. Just a friendly precaution regardless, however. There are webm videos there that also crash Firefox. I'm simply trying to give as much information as I possibly can. webm video continues playing fine outside of the browser... in Windows, such as in Media Player Classic. And they also play in Google Chrome, as I mentioned previously. I'm now lead to believe something recently changed in Firefox I wasn't aware of until today. Same crashing results and behavior in "Waterfox" (www.waterfoxproject.org). No, it never happened before in that browser either.