Fed up with the vitriol left in comments, many sites are dumping their comment systems completely. It's just too costly to monitor them, so they tend to devolve into a cess pool. Personally, I just want the content most of the time. YouTube anyone?
To help with my own sanity (and maybe yours?), I wrote an extension that hides many comment systems - identifying them is somewhat predictable. It's available for Chrome and Firefox, or you can read more about it here too.
A lot, including but not limited to:
Some sites, like Facebook and Instagram, use random element identifiers and class names that change often. It's difficult to manage them and takes a lot of time, so I've thrown in the towel on them.
You might want to check out Fluff Busting Purity for Facebook or Antigram for Instagram. I'm not sure if either blocks comments, but at least you can cut out a lot of time-sucking distractions.
This extension checks whether comments should be disabled for the current URL, and is triggered when the page is first loaded or the URL changes (i.e. you click a link).
The allowed (whitelisted) sites are ones you define on the Options page. Specify a list of URLs as regex patterns, one per line, that should display comments all the time (the extension is effectively disabled for those URLs). Your list of allowed sites uses synchronized storage, so it should be available on any machine you've installed the extension on and are logged into.
Click on the icon in the toolbar and press the large "toggle" button to temporarily toggle enabling/disabling the extension for a single tab, in order to hide or display comments. Click it again to toggle it back. Reloading the page will cause it to follow the same rules as above, looking first at blocked sites and then your personal allowed sites.
You'll be notified that it can "read and change all your data on the websites you visit" because that's how it works - it hides certain comment-related elements on the page so you don't see them.
It also uses storage to save its state, but it shouldn't prompt you for that.
If you notice a commenting system that should be added (blocked), open an issue for that. Include the website where you noticed it, or create a pull request with the necessary changes to the "sites.json" file, and I'll follow-up as time permits.
Thanks!
Open a new issue with as many details as possible. The more you let me know upfront, the less I'll have to ask later!