It could be a leak but it could also be an inefficient piece of logic in Firefox. One could imagine that on every keystroke Firefox is scanning the entire inpu

It could be a leak but it could also be an inefficient piece of logic in Firefox. One could imagine that on every keystroke Firefox is scanning the entire input text for typos or malicious inputs whereas Chrome might be scanning only the text before the cursor back until the first whitespace (since the other text is already known).