IEability is a Firefox extension tailored for users needing access to legacy websites and applications that require Internet Explorer compatibility. It supports IE versions 7 through 11 and allows for effortless browsing of outdated web applications directly within the Firefox environment. Key functionalities include smart automation for switching to IE Tab mode based on URL rules, cookie synchronization between Firefox and IE, and single sign-on support, which collectively enhance user convenience and streamline the browsing experience.

Additionally, IEability features built-in IE Developer Tools, facilitating efficient debugging while maintaining a clean interface that resembles standard Firefox tabs. Users will need a Windows-compatible helper application for full integration, which is security-certified and virus-scanned to ensure a safe browsing experience. The extension is offered in both a free basic version and a premium version with additional features, catering to a range of user needs.