Lateral panel

[Airbank]

Hello,

I am encountering a small issue with Firefox. Every time I open the browser, the side panel (favorites, history or other) automatically appears for a few seconds and then disappears. This systematically occurs upon opening, even if I had disabled it.

Is this normal behavior? Is there a way to disable this automatic display at startup?

Thank you in advance for your help and excellent work on Firefox.

Best regards,
Airbank

[Agentvirtuel]

Hello

Use the Firefox Sidebar to access bookmarks, history and synced tabs
https://support.mozilla.org/en-US/kb/use-firefox-sidebar-access-bookmarks-history-synced
Use the sidebar to access tools and vertical tabs
https://support.mozilla.org/en-US/kb/use-sidebar-access-tools-and-vertical-tabs

Maybe
Changes to toolbars and window sizes are not saved
https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved
Try Solution 1: Delete xulstore.json file