Fixed OpenSearch for Firefox

[tipue-dev]

Proposed change

Firefox has a bug where cookies are not send to get the OpenSearch description file. To bypass the bug, we need to add the session id to the url. 1 - 🐞 bug 🐞

Breaking change

Additional information

I can't find the 'Linked issues' function on the sidebar, maybe it's too late for me. This relates to issue https://github.com/znuny/Znuny/issues/318.

Checklist

• [x] The code change is tested and works locally.(❗)
• [x] There is no commented out code in this PR.(❕)
• [ ] You improved or added new unit tests.(❕)
• [ ] Local ZnunyCodePolicy passed.(❕)
• [ ] Local UnitTests / Selenium passed.(❕)
• [ ] GitHub workflow CI (UnitTests / Selenium) passed.(❗)