Is it the folder 'wlie9uxq.default' equivalent to the 'secret_code.default'?
Yes, wlie9uxq is "secret_code;" whenever and user begins using a newly-installed Firefox, Thunderbird or Seamonkey that code is generated specifically and uniquely for that user and that package initialization. I just used "secret-code" to represent the unique code.
It's quite possible that uninstalling Firefox (Mozilla?) did away with your bookmarks file (although I can't imagine why that would happen). Normally, you would simply install a new package (Firefox and Seamonkey co-exist quite nicely) alongside another Mozilla package without removing or uninstalling anything.
Just for future reference, make back up copies of bookmarks.html
(in Thunderbird and Seamonkey) every so often...
Best of luck with it.