Solution : https://service.sap.com/sap/support/notes/1296463 (SAP Service marketplace login required)
Key words : 
internal meta-tag-based configuration, sap supports microsoft service pack 3, install adobe reader/director, /irj/sdn/nw-70 ehps, key firefox notes relating, find browser support information, general considerations sap, sap interactive forms, browser version solution, product availability matrix
Related Notes : 
       
| 1628530 | Firefox Release Notes for Administrators | 
| 1612245 | |
| 1604969 | Corrections for unified rendering 700/25 I (UR mimes) | 
| 1604205 | Corrections for unified rendering 701/10 V (UR mimes) | 
| 1602569 | Internet Explorer and Firefox browser support for Web Dynpro | 
| 1599159 | Internet Explorer 9 Release Notes | 
| 1583947 | Microsoft Internet Explorer Version 9 for end users | 
| 1566444 | Main Browser Note for BS7i2010 | 
| 1485525 | No Adobe Reader support for Firefox 3.x on MacOS | 
| 1403485 | Browser Support: Windows 7 | 
| 1393114 | New features in SAP GUI for Windows 7.20 | 
| 1384060 | IFbA and Microsoft Internet Explorer Version 8.0 | 
| 1347768 | Web Dynpro and Microsoft Internet Explorer Version 8.0 | 
| 1294877 | Blocker Toolkit for Internet Explorer 8 | 
| 1267206 | Position of the context menu in Firefox/Safari browser | 
| 1247131 | Firefox: Error message "Server connection not available" | 
| 1111141 | FileDownload for Firefox does not work | 
| 1098009 | Web Dynpro ABAP - List of known Restrictions and Browser Support | 
| 1090464 | Interactive Forms-Web Dynpro Java-Limitations/Recommendation | 
| 1089062 | FireFox Limitations for Unified Rendering and ACF | 
| 1029680 | BEx Web applications Java: Limiations for Firefox | 
| 1016683 | ACF controls on Vista | 
| 993575 | Mozilla/Firefox limitation - tabbed browsing | 
| 991449 | Web Dynpro and Microsoft Internet Explorer Version 7.0 | 
| 990763 | HTMLB Handling of Internet Explorer 7 | 
| 990246 | Browsr contxt men instead of Web Dynpro contxt men (Firefox) | 
| 990034 | Firefox browser for end users | 
| 981710 | Microsoft Internet Explorer Version 7.0 for end users | 
| 957075 | FireFox Limitations for Theme Editor | 
| 951053 | Safari Browser mapped to Firefox 1.x instead of IE6 | 
| 849422 | Firefox: Button cannot be given a width | 
| 802407 | RTL Support in Web Dynpro | 
| 766191 | Active Component Framework Installation | 
| 598860 | Browsers supported by BSP | 
| 147519 | Maintenance strategy / deadlines for SAP GUI | 
| 66971 | Supported SAP GUI platforms |