Here's how you can change browser permissions on a site by site basis in Google's Chrome browser.
1. Open Chrome and go to the site.
2. Click the icon right next to the site's URL at the top of the Chrome browser.
4. Click the drop down button next to each option to change it.
5. You can choose from the following settings:
Always Allow On This Site
Block On This Site
Use Global Default
For more, see the original article at the link below.