Tighten LinkedIn browser extension popup URL handling by parsing the active tab URL and matching on protocol, hostname, and pathname instead of substring checks, preventing logic from running on non-LinkedIn hosts. Resolves [Code Scanning Alert 209](https://github.com/twentyhq/twenty/security/code-scanning/209) and [Code Scanning Alert 210](https://github.com/twentyhq/twenty/security/code-scanning/210).