Firefox

see Thunderbird as well

Settings

about:config
browser.tabs.closeWindowWithLastTab -> false
browser.sessionstore.interval -> 1500000
 see https://www.servethehome.com/firefox-is-eating-your-ssd-here-is-how-to-fix-it/
media.video-wakelock -> false
 to disable prevent sleep see https://apple.stackexchange.com/questions/412695/how-do-i-stop-the-firefoxcp-process-from-preventing-sleep-on-macos

Firefox Add-Ons

• uBlock Origin Ad-Blocker (preferred to Adblock Plus)
• Google OptOut
• Disconnect (preferred to Ghostery)
• HTTPS Everywhere
• Column Reader
• DownThemAll
• DownloadHelper (DL YT Videos)
• Toggle Proxy
• NoScript
• Flashblock