Mozilla (Suite) was similar to Netscape Commumicator and included browser, mail, webpage editor and maybe other functions as well. I don’t recall you could install the components separately. Later they decided to release a standalone browser (Phoenix/Firebird/Firefox) and then mail client (Thunderbird). IIRC they had standalone calendar (Sunbird) and webpage editor as well. Eventually they discontinued Mozilla and the closet thing would be the community-maintained Seamonkey.
I switched to Pear Launcher. Pretty affordable and doesn’t request network connection permission. It’s not as feature rich as Nova but it fulfills my needs. You can assign swipe up gesture on app icon (but not swipe down and not on folder).
IIRC they switched to webextensions in Firefox 57 in 2017. Even before that it was never the browser with the biggest market share, and Chrome had already got a huge market share in 2017.
I’ve been using Phoenix/Firebird/Firefox as my default browser since 2003. Never understood the appeal of Chrome.
I do this mainly because I would get motion sickness from UI animation. Not trolling, see how most mainstream OS developers added disabling animation as an accessibility option.