Open the browser to whatever web page. Mouse to the address bar icon, hold down the left button, then drop the icon into the browser icon on the taskbar.

Hi, no but as above can do. But can turn on the Bookmark Toolbar by mousing to the top of the Browser and then Right Click. Or Customize mouse to bottom left corner to Toolbars.

It will turn on a space under the Address Bar where you can drag and drop URL's also can make Folders for like minded things.

You can Right Click a Tab for Menus : Pin Tabs, Bookmark all tabs will stick them into a New Folder.

Then there is Sessions in Options : very 1st at the top. Where if Exit you can have the set of tabs start up where you left off.

If wanting to segregate your life online there is this : https://addons.mozilla.org/firefox/addon/multi-account-containers/

Please let us know if this solved your issue or if need further assistance.