Both Opera and Firefox have a function that allows you to type a nickname / keyword into the address bar, and then automatically load the bookmark URL associated with that nickname/keyword. More info: Opera bookmark nicknames | Firefox bookmark keywords
Opera 12 is currently my main browser, but I am now thinking of using Firefox as my main browser after the Opera 15 fiasco. I used Transmute as recommended by the current top answer in this SU post to export my Opera bookmarks into Firefox: How to synchronise bookmarks between Google Chrome and Opera? - but it doesn't preserve the nicknames/keywords of my Opera bookmarks. They are gone upon conversion to Firefox bookmarks.
Is there another software (offline or web application), browser extension or solution that I can use to convert or transfer my Opera bookmarks into Firefox while preserving bookmark nicknames/keywords?
I am using Opera 12 and Firefox on Windows 7.