Flow2API Token Updater per Gooose

Flow2API Token Updater is for users who run their own Flow2API service. During setup, the user enters a Flow2API site address plus their Flow2API username and password once. The extension uses that login only to obtain an internal plugin connection credential, does not keep the password for long-term use, then collapses setup and switches to a simple sync flow. After setup, opening the popup automatically checks and syncs the current browser profile or container's Google Labs session to the user's own Flow2API server, and the main button can trigger another manual sync immediately. Within one Firefox-based profile, the add-on keeps recent sync status and the last successful Labs session context scoped to the active cookie store or container so different signed-in accounts do not overwrite each other. In the AMO listed build, install-time host access is limited to https://labs.google/*; access to the user-entered Flow2API origin is requested at runtime only when the user connects a site. If a reusable browser login still exists but the related Google page is not open, the extension may silently open labs.google in a background tab to rediscover the session and then close the temporary tab. It supports Chromium browsers and Firefox-based browsers such as Firefox and Zen.