Safari not working after updating to El Capitan; no fixes work

I updated to El Capitan 10.11.3 today. Safari doesn't work (for my user only). It opens but won't load any websites. I have tried every single fix I could find by searching Apple Support and nothing works (emptying cache, deleting various library files, preferences, extensions, etc.) Safari does work when I log in as a guest user and when I do a clean reboot. I would really, really like to continue using Safari, but I'm about ready to uninstall El Capitan. I ran EtreCheck as advised in some posts on this topic and the report is below, if that helps.

iMac (27-inch, Mid 2010)

Processor 3.2 GHz Intel Core i3

Memory 12 GB 1333 MHz DDR3

EtreCheck version: 2.9.9 (260)

Report generated 2016-03-07 16:39:33

Download EtreCheck from https://etrecheck.com

Runtime 5:38

Performance: Below Average

Click the [Support] links for help with non-Apple products.

Click the [Details] links for more information about that line.

Click the [Check files] link for help with unknown files.

Problem: Other problem

Description:

Safari doesn’t work.

Hardware Information:ⓘ

27" iMac (Mid 2010)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac11,3

1 3.2 GHz Intel Core i3 CPU: 2-core

12 GB RAM Upgradeable - [Instructions]

BANK 0/DIMM0

2 GB DDR3 1333 MHz ok

BANK 1/DIMM0

2 GB DDR3 1333 MHz ok

BANK 0/DIMM1

4 GB DDR3 1333 MHz ok

BANK 1/DIMM1

4 GB DDR3 1333 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

Wireless: en1: 802.11 a/b/g/n

Video Information:ⓘ

ATI Radeon HD 5670 - VRAM: 512 MB

iMac 2560 x 1440

System Software:ⓘ

OS X El Capitan 10.11.3 (15D21) - Time since boot: about 2 hours

Disk Information:ⓘ

ST31000528AS disk0 : (1 TB) (Rotational)

EFI (disk0s1) <not mounted> : 210 MB

Macintosh HD (disk0s2) / : 999.35 GB (456.41 GB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

HL-DT-STDVDRW GA32N disk1 : (640.2 MB) ()

disk1s1 (disk1s1) <not mounted> : 25 MB

disk1s2 (disk1s2) <not mounted> : 21 MB

disk1s3 (disk1s3) <not mounted> : 25 MB

disk1s4 (disk1s4) <not mounted> : 22 MB

disk1s5 (disk1s5) <not mounted> : 17 MB

disk1s6 (disk1s6) <not mounted> : 28 MB

disk1s7 (disk1s7) <not mounted> : 29 MB

disk1s8 (disk1s8) <not mounted> : 41 MB

disk1s9 (disk1s9) <not mounted> : 16 MB

disk1s10 (disk1s10) <not mounted> : 21 MB

disk1s11 (disk1s11) <not mounted> : 18 MB

disk1s12 (disk1s12) <not mounted> : 22 MB

disk1s13 (disk1s13) <not mounted> : 41 MB

disk1s14 (disk1s14) <not mounted> : 22 MB

disk1s15 (disk1s15) <not mounted> : 40 MB

disk1s16 (disk1s16) <not mounted> : 59 MB

disk1s17 (disk1s17) <not mounted> : 16 MB

disk1s18 (disk1s18) <not mounted> : 16 MB

disk1s19 (disk1s19) <not mounted> : 27 MB

disk1s20 (disk1s20) <not mounted> : 17 MB

disk1s21 (disk1s21) <not mounted> : 15 MB

disk1s22 (disk1s22) <not mounted> : 18 MB

disk1s23 (disk1s23) <not mounted> : 22 MB

disk1s24 (disk1s24) <not mounted> : 45 MB

disk1s25 (disk1s25) <not mounted> : 15 MB

USB Information:ⓘ

PNY Technologies USB 2.0 FD 4.05 GB

USB20FD (disk2s1) /Volumes/USB20FD : 4.05 GB (3.85 GB free)

Apple Computer, Inc. IR Receiver

Apple Inc. Built-in iSight

Logitech USB Receiver

Apple Card Reader

Apple Inc. BRCM2046 Hub

Apple Inc. Bluetooth USB Host Controller

Gatekeeper:ⓘ

Mac App Store and identified developers

Unknown Files:ⓘ

/Library/LaunchDaemons/GjIgcOf8h7.plist

One unknown file found. [Check files]

Kernel Extensions:ⓘ

/Library/Extensions

[loaded] com.movavi.driver.SoundGrabber (1.6.5 - SDK 10.6 - 2016-03-07) [Support]

/System/Library/Extensions

[not loaded] com.Cycling74.driver.SAVD (1.0.0d1 - SDK 10.6 - 2016-03-07) [Support]

[not loaded] com.Cycling74.driver.Soundflower (1.6.2 - SDK 10.6 - 2016-03-07) [Support]

[not loaded] com.aliph.driver.jstub (1.1.2 - SDK 10.7 - 2016-03-07) [Support]

[not loaded] com.tomtom.driver.UsbEthernetGadget (1.0.0d1 - 2016-03-07) [Support]

System Launch Agents:ⓘ

[failed] com.apple.FolderActionsDispatcher.plist

[not loaded] 6 Apple tasks

[loaded] 162 Apple tasks

[running] 67 Apple tasks

System Launch Daemons:ⓘ

[not loaded] 46 Apple tasks

[loaded] 159 Apple tasks

[running] 83 Apple tasks

Launch Agents:ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (2012-07-19) [Support]

[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a...plist (2015-10-15) [Support]

[running] com.amazon.sendtokindle.launcher.plist (2015-11-13) [Support]

[running] com.epson.Epson_Low_Ink_Reminder.launcher.plist (2015-01-19) [Support]

[loaded] com.epson.esua.launcher.plist (2015-06-29) [Support]

[running] com.epson.eventmanager.agent.plist (2014-09-21) [Support]

[loaded] com.google.keystone.agent.plist (2016-03-02) [Support]

[loaded] com.hp.help.tocgenerator.plist (2009-07-28) [Support]

[loaded] com.oracle.java.Java-Updater.plist (2015-06-08) [Support]

Launch Daemons:ⓘ

[running] GjIgcOf8h7.plist (2015-06-18) [Support]

[loaded] com.adobe.ARMDC.Communicator.plist (2015-10-15) [Support]

[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (2015-10-15) [Support]

[loaded] com.adobe.fpsaud.plist (2016-01-29) [Support]

[running] com.crashplan.engine.plist (2016-01-14) [Support]

[loaded] com.ea.origin.ESHelper.plist (2016-02-07) [Support]

[running] com.fitbit.galileod.plist (2015-10-30) [Support]

[loaded] com.google.keystone.daemon.plist (2016-03-02) [Support]

[loaded] com.macpaw.CleanMyMac2.Agent.plist (2015-11-29) [Support]

[loaded] com.macpaw.CleanMyMac3.Agent.plist (2016-02-25) [Support]

[loaded] com.microsoft.office.licensing.helper.plist (2011-03-10) [Support]

[loaded] com.oracle.java.Helper-Tool.plist (2015-06-08) [Support]

[loaded] com.skype.skypeinstaller.plist (2014-04-11) [Support]

[not loaded] org.eyebeam.SelfControl.plist (2015-11-09) [Support]

User Launch Agents:ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist (2012-07-29) [Support]

[running] com.akamai.single-user-client.plist (2015-09-23) [Support]

[running] com.amazon.music.plist (2016-02-17) [Support]

[loaded] com.citrixonline.GoToMeeting.G2MUpdate.plist (2015-05-05) [Support]

[loaded] com.macpaw.CleanMyMac3.Scheduler.plist (2016-02-25) [Support]

[running] com.pia.pia_manager.plist (2014-11-01) [Support]

[running] com.spotify.webhelper.plist (2016-03-07) [Support]

[loaded] com.valvesoftware.steamclean.plist (2014-10-17) [Support]

User Login Items:ⓘ

Fitbit Connect Menubar Helper Application (/Applications/Fitbit Connect.app/Contents/MacOS/Fitbit Connect Menubar Helper.app)

CleanMyMac 3 Menu Application (/Applications/CleanMyMac 3.app/Contents/MacOS/CleanMyMac 3 Menu.app)

Spotify Application Hidden (/Applications/Spotify.app)

Other Apps:ⓘ

[running] com.fitbit.GalileoMenubar.126752

[running] com.google.Chrome.61792

[running] com.macpaw.CleanMyMac3.Menu.15392

[running] com.spotify.client.98592

[loaded] 423 Apple tasks

[running] 174 Apple tasks

Internet Plug-ins:ⓘ

AdobePDFViewerNPAPI: 15.010.20059 - SDK 10.8 (2016-02-24) [Support]

Flash Player: 20.0.0.306 - SDK 10.6 (2016-02-24) Cannot contact Adobe

AdobePDFViewer: 15.010.20059 - SDK 10.8 (2016-02-24) [Support]

Unity Web Player: UnityPlayer version 5.0.3f2 - SDK 10.6 (2015-08-03) [Support]

googletalkbrowserplugin: 5.41.3.0 - SDK 10.8 (2015-12-11) [Support]

iPhotoPhotocast: 7.0 - SDK 10.8 (2013-10-22)

DirectorShockwave: 12.1.3r153 - SDK 10.6 (2014-06-24) [Support]

QuickTime Plugin: 7.7.3 (2016-01-13)

FlashPlayer-10.6: 20.0.0.306 - SDK 10.6 (2016-02-24) [Support]

AmazonMP3DownloaderPlugin: AmazonMP3DownloaderPlugin 1.0.17 (2012-02-15) [Support]

AmazonMP3DownloaderPlugin1017277: AmazonMP3DownloaderPlugin 1.0.17 (2012-09-20) [Support]

Musicnotes: 1.19.0 (2011-08-05) [Support]

Silverlight: 5.1.41212.0 - SDK 10.6 (2016-02-24) [Support]

CouponPrinter-FireFox_v2: Version 1.1.6 (2011-07-27)

Default Browser: 601 - SDK 10.11 (2016-01-13)

Flip4Mac WMV Plugin: 2.4.4.2 (2013-07-15) [Support]

o1dbrowserplugin: 5.41.3.0 - SDK 10.8 (2015-12-15) [Support]

SharePointBrowserPlugin: 14.6.1 - SDK 10.6 (2016-02-18) [Support]

JavaAppletPlugin: Java 8 Update 65 build 17 (2016-02-24) Check version

OfficeLiveBrowserPlugin: 12.3.6 (2013-03-19) [Support]

User internet Plug-ins:ⓘ

CitrixOnlineWebDeploymentPlugin: 1.0.105 (2013-04-25) [Support]

npBcsMcTcIO: Unknown (2013-08-26) [Support]

Safari Extensions:ⓘ

3rd Party Preference Panes:ⓘ

Akamai NetSession Preferences (2016-02-24) [Support]

Flash Player (2016-01-29) [Support]

Flip4Mac WMV (2012-05-15) [Support]

Java (2016-02-24) [Support]

Perian (2011-07-23) [Support]

Time Machine:ⓘ

Time Machine not configured!

Top Processes by CPU:ⓘ

21% Spotify Helper(2)

4% Spotify

2% WindowServer

1% kernel_task

1% fontd

Top Processes by Memory:ⓘ

1.55 GB Google Chrome Helper(10)

904 MB kernel_task

356 MB mdworker(7)

295 MB Spotify Helper(2)

270 MB mds_stores

Virtual Memory Information:ⓘ

3.08 GB Free RAM

8.91 GB Used RAM (3.21 GB Cached)

0 B Swap Used

Diagnostics Information:ⓘ

Mar 7, 2016, 01:49:54 PM ~/Library/Logs/DiagnosticReports/netsession_mac_2016-03-07-134954_[redacted].cr ash

/Users/USER/*/netsession_mac

Mar 7, 2016, 01:47:41 PM Self test - passed

Mar 7, 2016, 11:33:07 AM ~/Library/Logs/DiagnosticReports/PluginProcess_2016-03-07-113307_[redacted].cra sh

com.apple.WebKit.PluginProcess - /System/Library/Frameworks/WebKit.framework/Versions/A/PluginProcess.app/Conten ts/MacOS/PluginProcess

Mar 7, 2016, 11:02:24 AM /Library/Logs/DiagnosticReports/System Preferences_2016-03-07-110224_[redacted].hang

/Applications/System Preferences.app/Contents/MacOS/System Preferences

Mar 7, 2016, 10:25:09 AM ~/Library/Logs/DiagnosticReports/netsession_mac_2016-03-07-102509_[redacted].cr ash

Mar 7, 2016, 10:17:09 AM ~/Library/Logs/DiagnosticReports/suggestd_2016-03-07-101709_[redacted].crash

/System/Library/PrivateFrameworks/CoreSuggestions.framework/Versions/A/Support/ suggestd

Mar 7, 2016, 10:00:09 AM /Library/Logs/DiagnosticReports/ListenToYoutube_2016-03-07-100009_[redacted].cr ash

/Library/Application Support/ListenToYoutube/*/ListenToYoutube