STR 1. Launch Firefox from taskbar in the primary display whose scale is over 100% 2. Make sure "Restore previous session" of "Startup" settings is checked 3. Open new window and move it into another display whose scale is 100% 4. Quit Firefox from menu 5. Launch Firefox from taskbar in the primary display AR The display in another display is restored bigger. ER The display in another display should be restored with the previous size. If windows in other displays are snapped to screen edges, they are restored as expected sizes. In my environment, the primary display is 200%, the other displays are 100%. So, the windows are restored twice bigger.
Bug 1557587 Comment 0 Edit History
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STR 1. Launch Firefox from taskbar in the primary display whose scale is over 100% 2. Make sure "Restore previous session" of "Startup" settings is checked 3. Open new window and move it into another display whose scale is 100% 4. Quit Firefox from menu 5. Launch Firefox from taskbar in the primary display AR The display in another display is restored bigger. ER The display in another display should be restored with the previous size. ~~If windows in other displays are snapped to screen edges, they are restored as expected sizes.~~ In my environment, the primary display is 200%, the other displays are 100%. So, the windows are restored twice bigger.