Bug 565718 added a zoom indicator to the URL bar. The first time it's shown, the indicator has a little animation to draw attention to it: @keyframes urlbar-zoom-reset-pulse { 0% { transform: scale(0); } 100% { transform: scale(1.5); } } This feels a bit jarring to me, because at the end of the animation it snaps back to 100% instantly. Seems like this would be a little bit smoother if it was more of a "bounce".

. o O (how do I always manage to click "take" next to QA Contact instead of assignee?) IIRC the fancy-pants way to do this is with "animation-timing-function: cubic-bezier(mumble)", but I'm not sure if that works with @keyframes and this is pretty dead-simple.

The mockup I did was more of a pulse than a grow: http://people.mozilla.org/~shorlander/mockups-interactive/firefox-ui/zoom-indicator-osx-yosemite.html Also avoids scaling the text (which seems pretty jaggy)

Comment on attachment 8781738 [details] Bug 1295769 - Zoom indicator zoom effect could be smoother. https://reviewboard.mozilla.org/r/72088/#review69868

Pushed by jdolske@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/d0efbd7c33fe Zoom indicator zoom effect could be smoother. r=ktbee

Verified as fixed using Firefox 51 beta 1 under Win 10 64-bit and Mac OS X 10.12. The animation is slightly smoother.