I am a broken record on this. "Tab Session Manager" + "OneTab" people!!!

  - Save all your tabs and windows which come under a single topic (say "Buy car", "Learn OpenCV", "Work") as a named session using Tab Session Manager
  - You can restore, replace your saved sessions at any point in the future.  You can also edit sessions, add/delete tabs, windows from the drop-down menu.
  - It also backs up your last 10 (can be adjusted in settings) sessions.
  - Very frictionless and intuitive UX.
  - Send all the rest of your unclassified tabs (interesting hackernews articles, your readinglist) to OneTab

https://addons.mozilla.org/en-US/firefox/addon/tab-session-m... https://addons.mozilla.org/en-US/firefox/addon/onetab/