I have Kagi Translate extension in Firefox based browsers (Zen browser, LibreWolf).
On certain sites, when I select text, and I click outside the selection to clear it, the page jumps (scrolls to top or to another position). In the attached video, it happens also when I click the translation bubble.
It is most probably caused by Translate extension, because when I disable it, it does not happen.
I happens on:
chatgpt.com, in the chat history
fastmail.com, in the message detail
To reproduce it, you need to scroll down a little bit.
Video:
That there is no sudden scrolling.