Adobe and Mozilla unable to fix Flash video crash problem

Around a quarter of the world's web surfing is done using Mozilla's Firefox browser

Adobe has as yet been unable to fix a problem which has left many Firefox users unable to watch Flash video online.

An update to the software - which is used by sites like YouTube - has been causing the Firefox browser to crash.

The problem was said to be affecting users of the browser on Windows Vista and Windows 7.

In a statement, Mozilla said: "Adobe and Mozilla are working closely to diagnose and address these issues."

It added: "In the meantime, Firefox users experiencing problems viewing videos in Flash Player should try the workarounds <link> <caption>listed in this help article</caption> <url href="http://support.mozilla.org/en-US/kb/flash-113-doesnt-load-video-firefox" platform="highweb"/> </link> ."

Among the suggested solutions is downgrading Adobe's software.

The update was initially released on 8 June.

No other browsers or operating systems are believed to have been affected by the problem.