You can easily import bookmarks from Opera .(Import bookmarks in Firefox)

              You have been using the Opera browser, but switched to Mozilla Firefox for some reason. You had saved many bookmarks and you want to import them.
              Importing your bookmarks form Opera to Firefox should be fairly simple. Firstly, create an HTML fi le of your bookmarks in Opera. This can be achieved by exporting the bookmarks. Open Opera, go to File, under that you will fi nd the option Import and Export. Click on it and then select the option Export bookmarks as HTML. Select a location and save it. Now open Firefox, select the ‘Bookmarks’ tab. Here you will see the option ‘Organize Bookmarks’. Under that select the option Import and then select the HTML file from the location where you have saved it.