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List of Alternatives to Adobe Programs
(feddit.org)
This is a most excellent place for technology news and articles.
Browser is nice. On Linux though, Okular is superb (except for its occasional problems with forms).
I'm really disappointed not to see Okular there. It's FOSS, and it's very cozy and useful.
What does Okular do that Firefox doesn't? I've used it on some distros because it was the default but I don't know the advantage compared to using my existing browser.