In the Opera browser (Opera), as in all others, has a function of storing bookmarks for visited pages. To add a bookmark just press Ctrl+D while viewing the page. Or in the lower left corner, click the arrow button and in the appeared pane, click the top button with an asterisk.
In addition to adding pages to bookmarks, you can save them all, writing in a separate file. From the same bookmark file can be restored on another computer.
To save bookmarks in Opera, go to "Menu" in the upper left corner, then "Bookmarks" and then "Manage bookmarks". This opens a window where in the top menu bar, click on the "File" button with the floppy disk icon. Next you need to choose "Export Opera bookmarks". A window will open prompting you to specify the location on disk where to save the file with the saved bookmark.