Firefox is extremely slow on first start up

http://www.youtube.com/watch?v=NYw4oHHGqJA
That is literally how it looks in realtime when I first start firefox. No such problem in Chrome.
So when I choose first link from bookmarks or fast dial, it takes minutes to load it and in the meantime firefox is stuck like it froze, while my HDD continuously works and works and works...

Your security may be monitoring the Firefox startup too closely.
A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls

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