you can either set up an entirely new xmarks account for this one and these bookmarks which may be the best way to go. Or I believe when you first put xmarks on a new pc it ask if you want to merge your bookmarks. or you can go through your original ones and clean out the dead ones, I know I have seen an add on or something that will do that for you clean out dead links from your bookmarks. AM-DeadLink Clean Out Dead Bookmark Links In Firefox And Internet Explorer how to use it I think there are a few others but that is the one I have seen recommended most often

I do read everyone's responses before posting my own. How many postings have we seen where in the middle of the responses there is "I didn't have time to read everyone else's answers, but I think the solutions is to [whatever]," when somebody up higher has already suggested that. To me, it's just disrespectful. Think about it this way: We are having conversations here. Now picture yourself out to lunch with a handful of friends, trading opinions. But you are zoning out, thinking about your grocery list, checking out the dessert at the next table. Then you make a contribution to the conversation--the same contribution that one of your friends made 10 minutes earlier. What you've basically done is tell that friend that she wasn't worth your time to listen to, that you really don't value that person. Now I know many of you wouldn't do that in person, yet we do it on these boards, just because it's a "virtual" acquaintance? (I'm sure there've been studies into the things we dare say to online acquaintances but would never, ever say to someone's face.) (And I think everybody is strapped for time, so that's really not an excuse, IMHO.) I think it's slightly different if someone here has posted a question asking if she should rip out her powder room's tile floor (just an example! OP of that, don't get upset!)--then she's really looking to see how the yes/no votes stack up.

For those on an iPad, you can also take a screen capture, or picture of what is currently displaying in your screen, by pressing the Home and Power buttons briefly at the same time. You will hear a sound like a camera taking a picture, and your screen image will appear in your Photos.

I'm an anti-download/needless utility person. People download silly utility after utility, and then wonder why their PCs run slowly. A simple alternative, perhaps what you've vaguely described as what you did, goes like this: Click on Bookmarks, Show All bookmarks, Import and Export, and then Export. You get to choose a file name and folder where the backup info is put. If you keep backup files (which you should), copy the file to that location or device too. Do a bookmark export periodically if you frequently add new ones. To restore your bookmarks should you lose your Firefox bookmarks, click on the same things and then choose Import a file instead of the Export command that created it.