Mozilla Firefox: Click on Library, then on
Bookmarks, then on Show all Bookmarks (alternatively you can press Ctrl+Shift+B) and
then on Import and Backup
Google Chrome: Go to Bookmarks, then click
on Import Bookmarks and Settings
Microsoft Edge: Click on Favorites, then
click on the menu-icon (…) on top of the little
window and then on Import favorites
Choose, whether you wish to import from another browser or by using an html
file.
Make sure Favorites and bookmarks is checked under
what to import.