My iMac (2009) slows down after I go to sites that are memory intensive

I have noticed my computer slows down to a crawl after I use sites that I believe are memory intensive. Example of that is iFirstrowSports.eu (streams soccer games live). The latest one was Wix where my wife was building her web site using their html5 tools.
I have also noticed that when the system is running slow, not all websites run as slow as others. Fro example abola.pt is very slow, while yahoo.com or yahoo mail will be slow but not horrible. I am wondering if it has to do with how those sites use memory or the technology they leverage.
I went to EtrCheck and run a report. Note that this report was done when the system is performing well.
I would appreciate some help and advice.
Thanks
Problem description:
machine slows down when I go to sites that use video (ifirstrowsports.eu as an example) or memory (wix site creation tools)
EtreCheck version: 2.1.8 (121)
Report generated March 1, 2015 2:34:52 PM PST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (27-inch, Mid 2010) (Technical Specifications)
    iMac - model: iMac11,3
    1 2.93 GHz Intel Core i7 CPU: 4-core
    4 GB RAM
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 0/DIMM1
            Empty
        BANK 1/DIMM1
            Empty
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    ATI Radeon HD 5750 - VRAM: 1024 MB
        iMac 2560 x 1440
        spdisplays_display_connector
System Software: ℹ️
    Mac OS X 10.6.8 (10K549) - Time since boot: 18 days 7:33:22
Disk Information: ℹ️
    ST31000528AS disk0 : (931.51 GB)
        - (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.86 GB (581.16 GB free)
    OPTIARC DVD RW AD-5680H
USB Information: ℹ️
    LaCie P'9233 Desktop Drive 1.82 TB
        - (disk1s1) <not mounted> : 210 MB
        Time Machine (disk1s2) /Volumes/Time Machine : 2.00 TB (1.54 TB free)
    Apple Internal Memory Card Reader
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Dell Dell USB Optical Mouse
    Apple Inc. Built-in iSight
    Apple Computer, Inc. IR Receiver
Kernel Extensions: ℹ️
        /Library/Parallels/Parallels Service.app
    [loaded]    com.parallels.kext.prl_hid_hook (7.0 15106.786747) [Click for support]
    [loaded]    com.parallels.kext.prl_hypervisor (7.0 15106.786747) [Click for support]
    [loaded]    com.parallels.kext.prl_netbridge (7.0 15106.786747) [Click for support]
    [loaded]    com.parallels.kext.prl_vnic (7.0 15106.786747) [Click for support]
        /System/Library/Extensions
    [not loaded]    com.ni.Fantom.nxtfwdl (1.1.1) [Click for support]
    [loaded]    com.parallels.kext.prl_usb_connect (7.0 15106.786747) [Click for support]
Startup Items: ℹ️
    Fantom: Path: /Library/StartupItems/Fantom
    Startup items are obsolete in OS X Yosemite
Problem System Launch Daemons: ℹ️
    [not loaded]    org.samba.winbindd.plist [Click for support]
Launch Agents: ℹ️
    [running]    com.mcafee.menulet.plist [Click for support]
    [running]    com.mcafee.reporter.plist [Click for support]
    [loaded]    com.parallels.desktop.launch.plist [Click for support]
    [loaded]    com.parallels.DesktopControlAgent.plist [Click for support]
    [running]    com.parallels.vm.prl_pcproxy.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [running]    com.fitbit.fitbitd.plist [Click for support]
    [running]    com.fitbit.galileod.plist [Click for support]
    [unknown]    com.mcafee.ssm.ScanManager.plist [Click for support]
    [running]    com.mcafee.virusscan.fmpd.plist [Click for support]
    [running]    com.parallels.desktop.launchdaemon.plist [Click for support]
    [loaded]    com.sonos.smbbump.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [failed]    com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist
    [loaded]    com.citrixonline.GoToMeeting.G2MUpdate.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.spotify.webhelper.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application Hidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Google Drive    Application (/Applications/Google Drive.app)
    Fitbit Connect Menubar Helper    Application (/Applications/Fitbit Connect.app/Contents/MacOS/Fitbit Connect Menubar Helper.app)
    Spotify    Application (/Applications/Spotify.app)
    handyPrintDaemon    Application (/Users/[redacted]/Library/PreferencePanes/handyPrint.prefPane/Contents/Library /LoginItems/handyPrintDaemon.app)
    Dropbox    UNKNOWN (missing value)
    Dropbox    Application (/Users/[redacted]/Desktop/Dropbox.app)
    Canon IJ Network Scanner Selector2    Application Hidden (/Library/Printers/Canon/IJScanner/Utilities/Canon IJ Network Scanner Selector2.app)
    Google Chrome    Application Hidden (/Applications/Google Chrome.app)
Internet Plug-ins: ℹ️
    JavaAppletPlugin: Version: 13.9.8 - SDK 10.6 Check version
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    EPPEX Plugin: Version: 3.0.5.0 [Click for support]
    AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
    AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.6.6
    OfficeLiveBrowserPlugin: Version: 12.3.3 [Click for support]
    SiteAdvisor: Version: 2.0 - SDK 10.1 [Click for support]
    Silverlight: Version: 5.1.20125.0 - SDK 10.6 [Click for support]
    iPhotoPhotocast: Version: 7.0 - SDK 10.7
User internet Plug-ins: ℹ️
    CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Click for support]
Safari Extensions: ℹ️
    SiteAdvisor
Audio Plug-ins: ℹ️
    iSightAudio: Version: 7.6.6
3rd Party Preference Panes: ℹ️
    3ivx MPEG-4 [Click for support]
    Flash Player [Click for support]
    handyPrint [Click for support]
Time Machine: ℹ️
    Time Machine information requires OS X 10.7 "Lion" or later.
Top Processes by CPU: ℹ️
        89%    Google Drive
        42%    storeagent
        30%    syslogd
        29%    mDNSResponder
         1%    VShieldScanManager
Top Processes by Memory: ℹ️
    198 MB    Google Chrome
    193 MB    App Store
    125 MB    Google Chrome Helper
    103 MB    WindowServer
    82 MB    mds
Virtual Memory Information: ℹ️
    1.48 GB    Free RAM
    1.57 GB    Active RAM
    667 MB    Inactive RAM
    572 MB    Wired RAM
    44.20 GB    Page-ins
    8.43 GB    Page-outs
Diagnostics Information: ℹ️
    Feb 28, 2015, 05:30:53 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/SystemUIServer_2015-02-28-1730 53_[redacted].crash

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

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Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
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The title of the Console window should be All Messages. If it isn't, select
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from the log list on the left. If you don't see that list, select
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Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
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Please don't indiscriminately dump thousands of lines from the log into this discussion.
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These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
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Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.

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