I have a brand new fairly high-end computer running at 4.3Ghz, with 2 new sata3 SSD's in raid-0 and 8gb ddr3-2133 RAM, running windows 8.1 pro freshly installed last night, using FF 27.0.1.
Adblock plus FF extension adds about 5 extra seconds onto my firefox loading times, not just on first start, even every warm load of FF is as slow as my old celeron 2Ghz laptop with 1GB ddr2 ram and a 5400rpm IDE HDD.
It adds more loading time to FF (even with no filters installed) than NoScript, Ghostery, Lazarus, IDM, Flash Video Downloader, LastPass do COMBINED!
Definitely something wrong when Battlefield bad company 2 or Adobe photoshop load faster..
I did notice however that once FF is open, I can load over 20 copies of it faster than the initial load, combinbed, with each consecutive copy loading instantly.
Another thing I noticed is that when loading, once the FF window is open but before the FF homepage is loaded, a large set of icons opens op and disappers on the toolbar.http://imgur.com/vf0PNez,AxBBGNT#0http://imgur.com/vf0PNez,AxBBGNT#1
Would love to see this fixed fairly soon.
Let me know theres any info I can provide to help