Are you using Windows 10? Edge should be the default browser there. If you want to stick with a Microsoft browser, Edge is the way to go. IE is not going to be supported or updated going forward. If you are using an older version of WIndows, that could be the problem as many browsers will not update on anything before 10 and, of course, an outdated browser won't always handle newer HTML, Java, etc., coding on pages.
I've used Chrome for years now. Gave up on Firefox due to it just being too slow. Maybe it's improved over those years? I'd like to hope so. Chrome has done a lot of updates lately. Make sure you have them. I use ad block plus which does a good job, but many pages don't like it and won't work properly until I disable it for that particular site. There are privacy concerns with the latest major Chrome update. Big brother Google is watching you (though the data they collect should be used to improve your experience, many don't like the idea of it)
Often, when installing programs, they will offer to install browser add-ons, many of which are intended to protect you. If you aren't paying attention and don't uncheck the optional box, they will install. Having more than one of these (or any single one that is not working properly) will cause problems loading content and/or pages. In this case, you should see some message that it was blocked, though.
Usually there is a safe mode option to start Chrome with all the add-ons disabled. If you don't have or cannot find that, you can go into settings and disable all add-ons. If the sites work properly after doing so, then you can just enable the ones you want to use one at a time until you find the culprit. Once you have identified it, either disable it again or remove it from Chrome.
I also use Opera, specifically for Etsy stuff, since the listing preview does not work in Chrome for me. It's been around for quite a few years and is a good stable browser.
Lastly, make sure you scan your computer, not only for viruses, but for spyware/malware. I have used Malware Bytes for many years to keep my computer clean and to fix many other people's computers. Even the free version does a great job of cleaning, just no real time protection. If you use it, keep in mind the above mention about the browser add-on option it will offer you. Good idea? Maybe, but will it play nice with other add-ons? Maybe, maybe not.
Hope some of this helps.