Fixed
- The "Open in Mantis" menu entry no longer disappears after restarting Firefox.
- Issue numbers with a leading # (e.g. #1234) now work.
- Values like 1e3, 0x1A, -5 or 1.5 are no longer treated as issue numbers.
- Unusable Mantis URLs (e.g. without https://) are rejected in the options instead of opening broken tabs. If no URL is set yet, the options open automatically.

New
- The issue number is found within the selected text, e.g. "Issue #1234:" or "0001234: Fix login bug".
- The menu shows what you selected: Open “…” in Mantis.
- Just enter the address of your Mantis installation (e.g. https://mantis.example.com/) and view.php?id= is added automatically. Pasting a Mantis page or issue link works too.
- Issues open in a new tab next to the current one, in the same container.
- The options page shows which address an issue number will open.

Changed
- Updated to Manifest V3; requires Firefox 140 or later.
- A saved Mantis URL without a "?" is now treated as the address of your Mantis installation.
- Mantis Helper collects no data.

Organized file structure, added an invalid selection notice