I ran a stock mozilla-central build with my usual Australis profile, and found that whenever focused the URL bar to type in it, the "Go" arrow became giantsize. Presumably a hidpi bug, since this is a Retina MBP. Oddly, running my build with a new profile did not exhibit this problem. So presumably Australis has done something to cause m-c to break? I can reproduce this by running Australis against my new profile, and then reverting to m-c. If this needs a m-c fix, we should get to it before Australis lands so that people reverting back to the previous release don't hit this.

I've seen this before and I think it's a hidpi bug with the go button if it's not the combined stop/reload button, that has existed on m-c (even previous releases) for a long time now. I always assumed it was filed... I'll try and get STR.

STR: 1. Create a new profile on regular Nightly 2. Open the customize sheet (right click the toolbar, click "Customize") 3. Drag the reload button behind the stop button. 4. Click "Done" 5. Start typing in the URL bar. So I don't think this has too much to do with Australis per se. OTOH, I can't find a filed bug for this. :-\