I would expect the mouse back and forward buttons to go backwards and forwards when it makes sense. For example, in the browser and file manager they should map to the "Go Back" and "Go Forward" actions. This should probably be somewhat general in the UI library so that it would work more less "out of the box correctly".
Pay now to fund the work behind this issue.
Get updates on progress being made.
Maintainer is rewarded once the issue is completed.
You're funding impactful open source efforts
You want to contribute to this effort
You want to get funding like this too