Countdown timer now resets when switching between URLs that previously had countdown timers on them

"&" parameters in a URL are now included when detecting URL changes.

Ignore URL changes caused by an anchor/hash fragment
More fixes to continue refreshing background tabs

Fixed an issue where a tab could stop auto-refreshing in the background

Feature - View and remove saved auto-refresh URLs
Fix - When a tab's URL changes, the auto-refresh state is updated according to the new URL

The extension icon now continues to update if a window that is actively refreshing is minimized and reopened.

URL mapping — Auto-refresh now tracks configured refresh period by URL, allowing tabs to automatically start refreshing if a user visits a URL that was previously being refreshed
Icon improvements — Better text rendering for icon when a tab is being refreshed