Safari 6 is running slowly compared to other browsers

I have been having problems for several weeks with my brand new Macbook Pro (Retina Display). I've been troubleshooting my internet connection for speed issues...turns out Safari runs very slow. It pauses for long periods of time to load webpages. I just downloaded Firefox 16 and it runs at blazing speeds comparitively! I've checked forums, and some say to disable extensions. The only extensions I use are Ad Block and 1 Password. I can't disable the 1Pass, but have disabled the Ad Block. Still having the same issues...
I would like to keep Safari as my browser due to iCloud integration, but can't stand this slow operation. Anyone have any suggestions?
Thanks!

Thanks for this advice, seems that there must be an issue with my profile. I ensured extensions are deleted on my user account. For some reason, many webpages load slowly although speedtest.com shows that my download speeds are very fast. I've been using Firefox a bit more since my last post and this browser is definitely running faster.
Any ideas how I can purge and/or reinstall Safari?

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OR
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Here is my EtreCheck. Can anyone help? THANK YOU!
EtreCheck version: 1.9.15 (52)
Report generated September 9, 2014 9:56:05 PM MST
Hardware Information: ?
MacBook Pro Intel Core i7, 15" (Mid 2012)
MacBook Pro - model: MacBookPro9,2
1 2.9 GHz Intel Core i7 CPU: 2 cores
8 GB RAM
Video Information: ?
Intel HD Graphics 4000 - VRAM: 512 MB
Color LCD 1280 x 800
System Software: ?
OS X 10.8.5 (12F45) - Uptime: 3 days 19:27:55
Disk Information: ?
TOSHIBA MK7559GSXF disk0 : (750.16 GB)
S.M.A.R.T. Status: Verified
disk0s1 (disk0s1) <not mounted>: 209.7 MB
Macintosh HD (disk0s2) / [Startup]: 749.3 GB (157.07 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
HL-DT-ST DVDRW GS31N
USB Information: ?
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ?
Apple Inc. thunderbolt_bus
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/etc/hosts - Count: 1
Gatekeeper: ?
Mac App Store and identified developers
Kernel Extensions: ?
[loaded] com.avast.AvastFileShield (2.1.0 - SDK 10.9) Support
[loaded] com.avast.PacketForwarder (1.4 - SDK 10.9) Support
[not loaded] com.seagate.driver.PowSecDriverCore (5.2.3 - SDK 10.4) Support
[not loaded] com.seagate.driver.PowSecLeafDriver_10_4 (5.2.3 - SDK 10.4) Support
[not loaded] com.seagate.driver.PowSecLeafDriver_10_5 (5.2.3 - SDK 10.5) Support
[not loaded] com.seagate.driver.SeagateDriveIcons (5.2.3 - SDK 10.4) Support
Problem System Launch Daemons: ?
[failed] com.apple.wdhelper.plist
Problem System Launch Agents: ?
[failed] com.apple.coreservices.appleid.authentication.plist
Launch Daemons: ?
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.adobe.SwitchBoard.plist Support
[loaded] com.avast.init.plist Support
[loaded] com.avast.uninstall.plist Support
[loaded] com.avast.update.plist Support
[loaded] com.google.keystone.daemon.plist Support
[loaded] com.microsoft.office.licensing.helper.plist Support
[invalid] com.oracle.java.Helper-Tool.plist
Launch Agents: ?
[not loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.avast.userinit.plist Support
[loaded] com.google.keystone.agent.plist Support
[invalid] com.oracle.java.Java-Updater.plist
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[loaded] com.adobe.ARM.[...].plist Support
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User Login Items: ?
iTunesHelper
uTorrent
Internet Plug-ins: ?
JavaAppletPlugin: Version: 14.6.0 - SDK 10.8 Check version
o1dbrowserplugin: Version: 5.4.2.18903 Support
Flip4Mac WMV Plugin: Version: 2.4.4.2 Support
AmazonMP3DownloaderPlugin101750: Version: AmazonMP3DownloaderPlugin 1.0.17 - SDK 10.4 Support
AdobePDFViewerNPAPI: Version: 11.0.07 - SDK 10.6 Support
FlashPlayer-10.6: Version: 14.0.0.176 - SDK 10.6 Support
Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.1
Flash Player: Version: 14.0.0.176 - SDK 10.6 Cannot contact Adobe
googletalkbrowserplugin: Version: 5.4.2.18903 Support
SharePointBrowserPlugin: Version: 14.1.0 Support
AdobePDFViewer: Version: 11.0.07 - SDK 10.6 Support
DirectorShockwave: Version: 11.6.8r638 Support
Safari Extensions: ?
wrc
Audio Plug-ins: ?
AirPlay: Version: 1.7 - SDK 10.8
iSightAudio: Version: 7.7.1 - SDK 10.8
iTunes Plug-ins: ?
Quartz Composer Visualizer: Version: 1.4 - SDK 10.8
User Internet Plug-ins ?
Google Earth Web Plug-in: Version: 7.1 Support
3rd Party Preference Panes: ?
Flash Player Support
Flip4Mac WMV Support
Paragon NTFS for Mac ® OS X Support
Time Machine: ?
Time Machine not configured!
Top Processes by CPU: ?
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      9% com.avast.daemon
      7% Dock
      6% WebProcess
      4% Finder
Top Processes by Memory: ?
254 MB WebProcess
188 MB AdobeReader
139 MB com.avast.daemon
131 MB Microsoft Word
98 MB WindowServer
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3.97 GB Free RAM
1.74 GB Active RAM
882 MB Inactive RAM
1.42 GB Wired RAM
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Ok this is nuts. Our client has a movie that will be
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the URL for the movie into the location bar it loads
fine. I'm new at this company and i've been given
this support ticket because i'm the only Mac guy in
the house. Most Mac issues i can track down, but
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