Version 0.1.18 adds explicit extension and toolbar icon declarations to the manifest so Firefox displays the packaged
ModHeader By GreatJIN icon instead of the default add-on icon.

No permission changes were made in this release.

Version 0.1.17 adds the alarms permission so the extension can support browser-managed scheduled background wake-ups
for maintenance and future rule refresh behavior.

No user-facing UI changes were made in this release.

Version 0.1.16 fixes Firefox for Android compatibility by removing the Chrome-only extraHeaders webRequest listener
option. The extension now registers onBeforeSendHeaders and onSendHeaders using Firefox-supported blocking and
requestHeaders options only.

This release also updates documentation to clarify that browser-managed request headers such as Sec-Fetch- and Sec-
CH-UA can only be modified when Firefox exposes them through requestHeaders.

Version 0.1.15 updates the Firefox implementation and documentation around webRequest-based header modification.

Changes include:
- Uses browser sync storage for profiles and rules when available, with local storage fallback.
- Migrates existing local settings to sync storage when sync storage is empty.
- Improves background rule hydration after the extension background context wakes.
- Updates diagnostics terminology from dynamic rules to webRequest rules.
- Adds clearer inline comments, documentation, dictionary, and variable references for maintainability.