Stack Overflow Internal supports the current and one previous stable release only of most common browsers and does not support developer or beta releases. Some browsers are partially supported and not all site functionality will work, but bugs may still get fixed at Stack Overflow's discretion.
Browser
Support
Comments
Firefox
Last two versions
See current version.
Chrome
Last two versions
See current version.
Safari
Last two versions
See current version.
Edge
Last two versions
See current version.
Safari for iOS
Partial
Firefox for Mobile
Partial
Chrome for iOS
Partial
Internet Explorer
Not Supported
Third-party services and domains
Stack Overflow also relies on several third-party services and domains for things like authentication and email communications which may need to be whitelisted by your IT department. For full functionality and the best possible experience, the following resources must be accessible:
External Services
Reason
Google
Authentication (via OAuth)
Facebook
Authentication (via OAuth)
Github
Authentication (via OAuth)
Browser Features
Reason
JavaScript
Basic Site Functionality
Cookies
Authentication and Some Site Functionality
Email Communications
Reason
@stackoverflow.com
Communications directly with Stack Overflow employees and support channels.
@stackoverflow.email
Automatic communications such as registration, password recovery, and newsletters.