Firefox extensions are only small bits of code that integrate with Firefox to give it added functionality. While it could be set to make your internet connection upon launching Firefox, it can not control the order or timing involved in programs that launch at startup. I ran a search through PCMag for this and came up empty.
What I can suggest, however, are small, stand-alone programs that can do just this. While I haven't tried any of them, they have both received good reviews and are said to be malware-free:
* Startup Delayer: FREE
* Absolute Startup: $30 after free trial
Hope this helps,
When I open windows I would like to be able to control the start up programs sequence of opening.The reason is that MSN and Yahoo have to wait for my ISP to load, and I want to set the latter to open first, after AV And Firewall. PCMag latest software update mentioned a Firefox Add-in which does this, but I deleted the email and can't find it in Extensions. Anybody help on this? Thanks in advance.