Chrome

Google Chrome just become my main browser. It (almost) has everything I need: Google Translate on page (just click an icon and the page is translated), Measureit, Twitter extension, Color picker, Web developer toolbar to validate HTML and CSS.

What is the missing piece? Firebug or something similar. Chrome has Developer Tools, but it's not coming close to Firebug. This is the only thing that makes me open Firefox.

Firefox on the Mac is becoming extremely slow, especially when viewing Flash and having multiple tabs open. I know, Flash sucks on the Mac, but nonetheless... Chrome just runs smoother.

 If you download the latest builds of Chrome for Mac you will notice it started to support flash. Still has glitches and bugs, but you can watch Youtube, Vimeo and other videos. This makes it a lot more usable now, at least to me :)