I have been using addons, that allow opening web pages in sidebar, and all share a similar drawback, which is why I believe it to be on the browser side. When I close the sidebar and open it again, the page gets reloaded. This makes using messengers etc. in sidebar much less comfortable. I noticed, however, that bookmarks and history, when opened in sidebar, remember the state the were in when last closed. Is there some simple way to make pages remember their state as well or it can only be done by changing the addons' or the browser's code?