Remember sidebar size

[Redlemon]

Sidebar size not saved after browser restart (Firefox 130.0.1 )

If you set the desired sidebar size and close the sidebar and restart the browser, the sidebar size is not saved, but reset to the default narrow one.
If you do not close the sidebar and restart the browser, the panel size is saved.
This needs to be fixed because it is annoying to adjust the sidebar size after each browser launch.

[Jon]

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