How are URLs yanked? Getting a different URL then displayed in the browser URL bar

[SVNKoch]

I'm opening this issue because:

• I'll report a bug / question

Steps to Reproduce

1. Go to https://status.sponsor.ajay.app/ and click the red icon in the top left, go back in the browser history.
2. Yank the URL: would expect https://status.sponsor.ajay.app/ instead get https://sponsorblock.instatus.com/
   copied to the clipboard and was wondering why this is

When yanking the URL after opening the link directly I get the expected link https://status.sponsor.ajay.app/.
Also when yanking after visiting the page from the red icon you too get a different URL then what the Firefox displays in the URL bar.

System configuration

• Operating system: Windows 8.1
• Firefox version: 98 (I should update again I think xD)
• Vim-Vixen version: 1.2.3

[ouuan]

I'm not sure what the reason is, but the page https://status.sponsor.ajay.app/ contains a single <iframe> whose src is https://sponsorblock.instatus.com.

It seems that Vim Vixen yanks the URL of the focused browsing context, so it yanks the src of the <iframe> after you click on the page.