What does your feature entail? What is it for? How will it affect existing workflows or user experience?
Low Power Mode suspends tabs after 5 minutes.
Suggestion: allow the user to choose the amount of minutes after which tabs are suspended, e.g. 5, 10, 30, 60.
What are the exact ways that you see a user using your proposed feature? Please go into as much detail as possible, and provide examples of how other browsers/apps implement this feature, if applicable. If your feature suggestion adds on to an existing feature, how would it work into it to extend its usefulness?
Hopefully the setting can be exposed with the others in the Settings window.