Visual Studio "Browse with..." multiple browsers
Here's a tip if you're doing a lot of cross browser ASP.NET or AJAX development in Visual Studio:
Right click an .aspx file and choose "Browse with..."
If you're like me you've probably added some additional browsers to your "Browse with" list like FireFox, Opera and Safari. If you want to view the page in multiple browsers, CTRL+click each item:
Hit "Browse" and all of the browsers will open for the specified page.
If you want to open multiple browsers every time, click "Set as Default":
Now all of the browsers will open whenever you choose "Browse" from the context menu.