The end of the user agent string displays the actual version of Firefox still. Instead of echoing rv:110, rv:111 and so on up to rv:119, Firefox returns rv:109 instead. To avoid this from happening, Mozilla decided to freeze part of Firefox's version. Firefox versions 110 to 119 are affected by the issue. Firefox's rv:110 value is identified wrongly as Internet Explorer in this case.įalse identification of Firefox may lead to compatibility issues, display issues or functionality issues.

The site in question checks for rv:11 in the user agent.

A Firefox user visits a website in Firefox 110 or any other version up to Firefox 119. Get latest user agents for Internet Explorer via API Internet Explorer 11, Windows 8, Mozilla/5.0 (Windows NT 6.2 Trident/7.0 rv:11.0) like Gecko Internet.

It was initially included in the release of Windows 8.1, Windows RT 8.

Internet Explorer 11's user agent: Mozilla/5.0 (Windows NT 6.1 WOW64 Trident/7.0 AS rv:11.0) like Gecko Internet Explorer 11 ( IE11) is the eleventh and final version of the Internet Explorer web browser.

Some sites identify Firefox as Internet Explorer because of inaccurate user agent sniffing. When done incorrectly, it may lead to false identification this is exactly what is happening on some sites currently regarding Internet Explorer user agent sniffing and the Firefox web browser.

Internet explorer 11.0