A couple of weeks ago my Firefox desktop suddenly stopped loading images correctly. This is especially true for image-heavy websites like Tumblr. Images will either not load or only partially load. It takes several refreshes to get even 75% of images to load properly (including Shift+Ctrl+R). My Internet connection and speed are normal. Weirdly, other browsers loaded images fine at first, but now they're laggy, too? They still work better in comparison, though. And the Internet on my iPhone and iPad are perfectly fine. I've tried all of these multiple times: Restarting my PC, Internet, and router. Disabling certain extensions (especially those for Tumblr and ad blockers). Restarting in Troubleshoot Mode without extensions. Reducing number of tabs. I tried the different Profile trick I found Googling this issue to death, and it works, but I want to fix my default profile's issues if I can. Oh, and YouTube is insufferable to watch and crashes the browser, but I suspect that might have to do more with what YouTube's trying to do with ad blockers. Especially since Chrome isn't much better on that count (aside from the crashing). Edit: This issue started occurring around the time I downloaded the last Firefox update before the latest one. I thought installing the latest one might solve the problem, but it didn't. This might just be a coincidence.