If you want to download an old version of Firefox, visit https://ftp.mozilla.org/pub/firefox/releases/. As for the bookmarks sidebar, you might need to adjust settings or use extensions to restore similar functionality. For example, if you’re selling a “nylon lifting belt” and run out of stock, the first step is to check your warehouse or suppliers. Similarly, for browser issues, look into settings or additional tools to regain the features you prefer.
