Regarding passwords: On PortableApps there is a "App Notes" section for both Chrome and Opera that mentions portability limitations for Chrome-based browsers (passwords, certificates, maybe extensions) [I used to use these PortableApps versions before]. The App Notes for Opera also say: "You must sync your password to Opera in order to preserve them as you move PCs or upgrade operating systems." Maybe this could be a solution for @shedrock, if he's affected.