What comments are you talking about? Got a screen shot?

Is it a news or blog site? A lot of news sites and blogs use a cross-site comment provider. Because the comment section is embedded on various sites you might visit, it's possible for the comment provider to track your browsing around the web. For that reason, some comment providers have been added to the tracking server list blocked by the Tracking Protection feature. To test whether that is the issue:

Click the shield icon toward the left end of the address bar (next to the lock icon). On the panel that drops down, click the blue slider switch to disable protection. Firefox should reload the page, or you can use Ctrl+R.

Any improvement?

I have one. www.thetyee.ca is a news site and blog that switched over to Coral Commenting from Disqus on November 12th. As usual, you have to click the button on any article to see comments. Generally I am now not able to see comments (I say generally because I have found a workaround that works very rarely - go to an article from before November 12th but for which comments exist after the 12th and click on those comments - I can then log into my account for commenting, and then the newer sites work too for some reason. But when I close the browser or any update is applied, then I'm back to invisible comments.)

Screen shot provided showing the endlessly scrolling wheel from when I try to "show comments".

Also a screen shot when the endlessly scrolling wheel finally resolves some seconds or minutes later saying page error.

I use standard security, have whitelisted this site wherever I can find a place to do so, but don't know what to try next. Tyee help thinks it's a browser issue. Apart from Startpage, I don't use any other browsers so I wouldn't know.

Google Chrome shows me the same error. The attached would be for the site's reference in discussing the issue with their developers.