Thank you for using Page Sidebar and for your 4-star rating.
Page Sidebar uses the current Firefox Sidebar API. According to its design principle, when the panel is not visible, it gets unloaded, meaning it is also removed from memory. You can read more about this on the official Mozilla developer documentation: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/user_interface/Sidebars If you would like to see improvements to the sidebar API, I encourage you to share your feedback directly with the Firefox team.
Please for feedback or questions, use the support form: www.stefanvd.net/support I am happy to help you over there.
