I have been using a plugin to Firefox called Google browser Sync. I use at least 3 computers each day - work, laptop, home computer. After installing the plugin on all 3 it helps me coordinate my Firefox settings on all 3. I leave work and when I login at home the same websites I last opened in Firefox will open at home. Of course its a choice. You can choose to say no and open a new web site. This is just my opinion and I have no idea of any privacy concerns here but I find it very convenient.