Hello,

Go to the browser that you want to make your default. Normally, they will prompt you asking if you want to set them to default. If not, go into the settings and look for the option there. For example, for Internet Explorer if you click on the Gear icon and select Internet Options, under the Programs tab there will be a button that allows you to make it your default browser.

Hello stumpoj, in your win 7 Start menu > Control Panel > Programs > Default Programs > Set your default programs, choose what you want and select OK.

In firefox  : Firefox button(the orange one) or Tools > Options > Advanced panel > General tab > UNCHECK the Make Firefox the default browser.

firefox 19.0 ? note it is unsupported and vulnerable, your win 7 support the latest firefox version, if you want : Update Firefox to the latest version

thank you