Steps To Reproduce: 1. Enable new findbar user_pref("findbar.highlightAll", true); user_pref("findbar.modalHighlight", true); 2. Open Wikipedia (e.g. https://en.wikipedia.org/wiki/Firefox ) 3. Open Find Bar (Ctrl+F) 4. Type "mozilla" (without quotation marks) in the Find Bar 5. Scroll down Actual Results: Dimmed background does not render to the entire page. i.e. Dimmed background is not enough width and height. Expected Results: Dimmed background should render over the entire page Regression window: https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=2edc35144ebf50ca6339e686e766e200cc4b04b8&tochange=f76b9d417a3678f840f498598d215b41f5c6616a Suspect: 69c852865f06 Mike de Boer — Bug 1290913 - prevent flushing the layout when dimmed highlight background is constructed. r=jaws

This has been corrected

(In reply to kalevibaik from comment #1) > This has been corrected No, This is not fixed yet.

Bug 1279695 does not fix the problem... STR. 1. Enable new findbar user_pref("findbar.highlightAll", true); user_pref("findbar.modalHighlight", true); 2. Open Wikipedia (e.g. https://en.wikipedia.org/wiki/Firefox ) 3. Resize browser window to w=640px, H=850px, so that horizontal and vertical scroll bar appear. 4. Open Find Bar (Ctrl+F) 5. Type "mozilla" (without quotation marks) in the Find Bar --- observe, Dimmed background size 6. Scroll down --- observe, Dimmed background size Actual Results: Dimmed background does not render to the entire page. i.e. Dimmed background is not enough Width and Height.

(In reply to Alice0775 White from comment #3) > Bug 1279695 does not fix the problem... Well, this has only just merged into mozilla-central, so there's no Nighly build out yet with this in it. Can you try it with tomorrow's Nightly?

(In reply to Mike de Boer [:mikedeboer] from comment #4) > (In reply to Alice0775 White from comment #3) > > Bug 1279695 does not fix the problem... > > Well, this has only just merged into mozilla-central, so there's no Nighly > build out yet with this in it. > Can you try it with tomorrow's Nightly? I have tested latest fx-team build. So the Bug 1279695 is included.

Gap at bottom and right side tested on https://hg.mozilla.org/mozilla-central/rev/a65b35c8e5b17c2585968974aef1da67a8c56642 Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 ID:20160826063819

(In reply to Alice0775 White from comment #6) > Gap at bottom and right side Aha! That's easy to fix - I'm accounting for the scrollbar width on both sides, but that's not necessary anymore since I'm using `getRootBounds()` now. Thanks for the screenshot!

Comment on attachment 8785593 [details] Bug 1296822 - ignore the scrollbar size when nsIDOMWindowUtils.getRootBounds is used when fetching the page size for the findbar. https://reviewboard.mozilla.org/r/74746/#review72988

Pushed by mdeboer@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/74516f0a4d8a ignore the scrollbar size when nsIDOMWindowUtils.getRootBounds is used when fetching the page size for the findbar. r=jaws

Verified as fixed on Windows, Ubuntu and Mac OS X on the latest Nightly 52.0a1 Build ID:20160922030437