Parameters not cleaned properly on Android Firefox when using YouTube share feature

[dot-mike]

In the YouTube web page for Firefox mobile on Android there is an option to share the current URL to the video, when doing so YT injects si into the URL. This sharing feature is using android native option share the URL (small popup).

Not sure there is any limitations to extensions not being able to intercept and modify the information when copying? Could be that the share button it self does some magic when clicking it.

Steps to reproduce:

1. Navigate to YouTube on Firefox on Android and play any video.
2. Click the share button and click copy to clipboard
3. Observe that si parameter is injected to the URL

Expected result:
URL as seen in URL-bar without any tracking parameters.

Actual result:
Tracking parameters injected to the URL for sharing.