Is there any FireFox plugin which acts the same as IE8 developer tools in a way that it has an option to switch from different modes or versions?
I had many issues when installing different versions of FireFox in just one machine. I now have 3.0, 3.6, 4.0.1 and 5.0.1 of FF but I got a problem regarding add-ons, it seems like they share just one location where add-ons are in.
If I open FF 3.0, since some add-ons are latest version for 4.0.1 and are not compatible with FF 3.0, it will disable them, then when I go back to the later version, add-ons which was disabled by the older FF will be gone.
Anyway my platform is Windows 7 32-bit.
Start firefox with following option
For each profile you can add individual addon’s which do not conflict with other profile addons. Ensure you give different names for different profiles in different firefox versions.