The Help button is clipped in a new profile (with no persisted page info dialog size). Nothing was clipped before the help button was added so marking as a regression. This is probably as simple as increasing pageInfoWindow.height. [1] Abhinav, is this something you would like to work on? [1] https://mxr.mozilla.org/mozilla-central/search?string=pageInfoWindow.height

Can I work on this? I'm new on Bugzilla.

I'm able to reproduce it on my Win 10 machine.

Yes, you may work on it. We usually wait until a patch is attached to the bug before we assign the bug to new contributors.

I tried changing the value of pageInfoWindow.height in /browser/ locales/ en-US/ chrome/ browser/ pageInfo.dtd . I also tried replacing height="&pageInfoWindow.height;" in /browser/base/content/pageinfo/pageInfo.xul with an actual value but that didn't help too. Can you suggest something else that I can try?

Did you make sure that you are using a new profile? The window height may have been cached from adjusting the window previous to testing your patch.

Yes. I tried it after removing the persist tag.

IIRC, removing the persist attribute doesn't remove the saved value. Please test with a new profile.

Changed PageInfoWindow.height to 550 to fit the contents. Turns out that the height was actually being cached. Creating a new profile did the trick.