Browser Loader is a free and easy to use AppleScript based utility which will allow you to open any URLs in your currently running browser, no mater which browser that is and which one is set as the default browser.
To edit the browsers you use, open “/Applications/Utilities/AppleScript Editor.app” and then open the app bundle, this will reveal the script that does all the work behind the scenes, where you can make adjustments to the browsers used and their order.
Installation:
1. Run the app once
2. Set it as the default browser in Safari
3. Run this command from a Terminal window:
/System/Library/Frameworks/CoreServices.framework/\
Versions/A/Frameworks/LaunchServices.framework/\
Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user
4. Restart the system