Mozilla introduced a new permissions manager in Firefox 6 that allows you to define permissions on a per-site basis.
Permissions are currently restricted to the following parameters: Access your location, hide the mouse pointer, install add-ons, load images, maintain offline storage, open pop-up windows, receive notifications, set cookies, use the camera, and use the microphone.
Update: Mozilla removed about:permissions from Firefox 45 and newer. An alternative is not available which means that Firefox users have no option anymore to audit site preferences globally.
You can open the new permissions manager in Firefox by loading about:permissions. Just enter the about page in the location bar and hit the return key afterwards.
The screen that shows up should look like this.
The screen that opens up displays the default permissions for all sites accessed in the web browser, and a list of websites and a search form on the left of it. I'm not entirely sure how the list of sites is populated, it seems however that only sites that are visited frequently by the user are included.
Permissions can be set to "use default", "allow", "block" or "always ask".
I explain later how you can set permissions for a specific website if it is not included in that list.
Lets take a look at what the individual permissions are:
When you select one of the sites in the permission manager, you will see information about the data that it has currently stored in the browser. Firefox lists the number of cookies and passwords for instance that are stored by the site.
A button is displayed at the top right to forget about a specific site, which resets the settings for that site in the permissions manager so that it now abides to the default permission settings.
It can happen that you want to modify the permissions for a site that is not in the list of sites in the permissions manager. The easiest way to do that in this case is to open the website in question in the browser, right-click it and select Page Info from the available options. A new window opens where you need to switch to Permissions.
You can click on the icon next to the address of the website in the address bar as well to open the very same menu.
Here you can then modify the permissions for that site individually. This option has been available for quite some time in the Firefox web browser.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.