Current Issue: If you have 20 windows open with 20 tabs each and hit 'discard tabs in other windows' there will still be at least 20 active tabs because it is not possible to discard active tabs.
Workaround: For all non active windows, first create a new tab to about:blank. Then discard tabs in other windows as normal. Since about:blank uses no resources it will greatly reduce the browsers resources without making any irreparable changes.
Current Issue: If you have 20 windows open with 20 tabs each and hit 'discard tabs in other windows' there will still be at least 20 active tabs because it is not possible to discard active tabs.
Workaround: For all non active windows, first create a new tab to about:blank. Then discard tabs in other windows as normal. Since about:blank uses no resources it will greatly reduce the browsers resources without making any irreparable changes.