Firefox

cli

open url

firefox [url]

new window

firefox -new-window [url]?
firefox -new-instance [url]?

open firefox and lookup term using default search engine

firefox -search [term]

settings

open config panel

about:config

disable crash recovery annoyance

browser.sessionstore.resume_from_crash=false

disable notifications annoyance

dom.webnotifications.enabled=false

profile

bookmarks and sites visited

places.sqlite

preferences

prefs.js

documentation

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile