OPD sent repeatedly on Firefox

Environment

• OS version: macOS
• Browser version: Firefox 121.0
• Extension version: Adblock Plus 3.22; Release build for Firefox
• Last working version: (e.g. Adblock Plus 3.21)

Steps to reproduce

1. Install the latest ABP 3.22 release build
2. Create an after_navigation OPD in MoEngage or by following the steps below to use the IPM Mock server
   • Ensure the IPM mock server is up: https://qa-mock-ipm-server.glitch.me/
   • Open the extension's Options page
   • Send the following in the console: browser.runtime.sendMessage({type: 'prefs.set', key: 'ipm_server_url', value: 'https://qa-mock-ipm-server.glitch.me/'})
   • Also send in the console: browser.runtime.sendMessage({type: "prefs.set", key: "installation_id", value: "opdnavigationABP"});
   • Ping the extension by sending in the console: browser.runtime.sendMessage({type: 'testing.ping_ipm_server'});
3. After the OPD has been sent, navigate to example.com
4. Click on the CTA button
5. Open example.com again in a new tab

Observed behavior

The OPD is shown repeatedly after clicking on the CTA button and opening example.com again in a new tab 

Expected behavior

The OPD should only be shown once after navigating to example.com and clicking the CTA button.

Further information

This is only happening on Firefox