KDE Connect works with "Brave" but not with "Firefox"

[Joppla]

Describe the bug
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I ve installed the extention according the descriptions. In the Brave browser it works not, but in Firefox I get the message""no devices found"

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
   see description

Expected behavior
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¨That devices are connected

Screenshots
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Desktop (please complete the following information):

• OS/distro/version: [e.g. Ubuntu 18.04] Ubuntu 22.04
• Browser/version [e.g. chrome 76, firefox 68] Firefox 136.0.1 /Brave 1.76.74
• kdeconnect-cli version [kdeconnect-cli --version] kdeconnect-cli 21.12.3
• kdeconnect-cli devices [kdeconnect-cli --list-devices] why needed?
• kdeconnect-chrome-extension version [kdeconnect-chrome-extension -version] from today

Smartphone (please complete the following information):

• Device: [e.g. iPhone6] Fairphone 4
• OS: [e.g. iOS8.1] Android 13
• Browser [e.g. stock browser, safari] firefox
• Version [e.g. 22]

Additional context
Add any other context about the problem here.