Fix sahi to work with firefox 21

concat.js

//Open sahi/htdocs/spr/concat.js 
//and look for:

Sahi.prototype._isFF2 = function () {return /Firefox\/2|Iceweasel\/2|Shiretoko\/2/.test(this.navigator.userAgent);};
Sahi.prototype._isFF3 = function () {return /Firefox\/3|Iceweasel\/3|Shiretoko\/3/.test(this.navigator.userAgent);};
Sahi.prototype._isFF4 = function () {return /Firefox\/4|Iceweasel\/4|Shiretoko\/4/.test(this.navigator.userAgent);};
Sahi.prototype._isFF5 = function () {return /Firefox\/5|Iceweasel\/5|Shiretoko\/5/.test(this.navigator.userAgent);};

//and replace it with

Sahi.prototype._isFF2 = function () {return /Firefox\/2[.]|Iceweasel\/2[.]|Shiretoko\/2[.]/.test(this.navigator.userAgent);};
Sahi.prototype._isFF3 = function () {return /Firefox\/3[.]|Iceweasel\/3[.]|Shiretoko\/3[.]/.test(this.navigator.userAgent);};
Sahi.prototype._isFF4 = function () {return /Firefox\/4[.]|Iceweasel\/4[.]|Shiretoko\/4[.]/.test(this.navigator.userAgent);};
Sahi.prototype._isFF5 = function () {return /Firefox\/5[.]|Iceweasel\/5[.]|Shiretoko\/5[.]/.test(this.navigator.userAgent);};

//restart sahi and clear cache of browser....