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If you want to quickly find RSS feeds without having to view source:
Want My RSS for Firefox
openfeeds for Qutebrowser
Apparently Google has an RSS extension but I haven’t looked into it.
Some RSS tools that are useful:
MoRSS (worked for like, one niche website I look at, but still might be useful)
EDIT: By the way, Facebook has been working very hard to fight RSS at every corner, but most other platforms still support it.
Also, if you use Kontact like I do, it supports RSS feeds through Akregator
Tech bros learn about diminishing returns challenge (impossible)