Why do I get errors on startup related to nsBlockListService.js (and related VERY slow startup of Firefox)?
Every time Firefox opened
== I upgraded to Firefox 3.6
Please reply. I have the same problem.
The blocklist.xml file has nothing to do with Google or anti-phishing / anti-malware services. That block list comes from Mozilla and it contains a block for addons that are known to cause problems for a massive number of Firefox users based upon the crash data that is reported to Mozilla.
I can't help the user who started this thread, but IMO he is mis-informed or he drew the wrong conclusions from the information he found in his searches to try to solve his problems.
another server trying to come on
I had this problem for a good while - really frustrating!
Have a look at the list of nasty add-ons here https://www.mozilla.com/en-US/blocklist/ Compare the add-ons in Firefox (Tools-Add ons-extensions) with this list and if any are there, disable them.
Disabling AVG Safe Search fixed it for me.