Bug fixes:
- Fixed the extension icon not displaying correctly in the toolbar and about:addons
- Fixed the popup showing a large empty gap below the tracking status when little or no data has been recorded yet
- Fixed tracked time under 1 minute displaying as "0m" instead of "<1m", which could make it look like nothing was being tracked
- Improved reliability of background time tracking so an in-progress session survives the background page being unloaded and reloaded by Firefox, instead of potentially losing a few seconds of tracked time

This extension requires no account or login. It tracks time spent on websites locally using browser storage. To test: install the extension, browse a few websites, then click the icon to see tracked time. All data stays on-device, nothing is sent to any server.