Marc Andreessen said famously (or at least is paragraphed as saying) in 1994 that the "Browser is the Operating System" and people have been doing riffs on that since then.
https://www.forbes.com/sites/anthonykosner/2012/04/22/always...
https://www.theguardian.com/technology/2014/apr/09/software-...
This was also the idea behind Chromebooks: