User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20170518000419 Steps to reproduce: 1. Open the firefox inspect 2. Select any element of any website with 'pick an element from the page tool ' 3. Website's top portion it is working fine 4. Scroll the website page at the center or bottom . 5. Width and height is not displayed. Actual results: Website element computed width and height is displayed fine after scroll Expected results: Width and height will shown after the page scroll

Are you getting my point?

Yes: the width/height displayed inside the small dark tooltip over the highlighter is not visible when you scroll down, right? I was not able to reproduce this on FF54, but did manage to reproduce in FF53. I'm fairly certain this is a bug that Matteo [:zer0] fixed already. I can't remember which number this was though. Matteo: could you find the right bug and close this one as a duplicate please? Also, do you know why this was not uplifted to 53?