Upgraded new MBP MD 101LLA to 16g ram and runs slower now

Hi,

I tried posting this to Apple Support Community and it said I couldn't so this is the closest I could get.

I just bought this MBP MD101LLA last week from BestBuy. Upgraded RAM to 16g cos the colorful wheel kept spinning whenever I was using Firefox or anything (although, I do tend to have over 50-100 tabs open at a time). Upgraded RAM, Firefox kept crashing. Tried closing tabs, still crashing, uninstalled, reinstalled, seems ok now. Anyway, I am a Windows/Samsung person cos I can build/fix those but not Mac so much. I need help with why this computer is slow. Do I just need to put an SSD in it? Or bring it back. I have another MBP that my son spilled water in and I got that back to life last night, but it probably needs a new logic board, as it needs to be plugged in and the battery unplugged, but that's another story. Do I need to bring this one back? Or just delete stuff off the menubar or SSD it? Or is it Yosemite 10.10.3? Thank you so much for your help. Following is the EtreCheck info.

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Problem description:

Added 16 gb RAM to a brand new Macbook Pro (13-inch, Mid 2012 MD 100) and first Firefox kept crashing (reinstalled) and computer is still running slow and at 128 degrees.

EtreCheck version: 2.2 (132)

Report generated 5/5/15, 3:48 PM

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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

MacBook Pro (13-inch, Mid 2012) (Technical Specifications)

MacBook Pro - model: MacBookPro9,2

1 2.5 GHz Intel Core i5 CPU: 2-core

16 GB RAM Upgradeable

BANK 0/DIMM0

8 GB DDR3 1600 MHz ok

BANK 1/DIMM0

8 GB DDR3 1600 MHz ok

Bluetooth: Good - Handoff/Airdrop2 supported

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

Battery: Health = Normal - Cycle count = 5 - SN = W050501GMD3LC

Video Information: ℹ️

Intel HD Graphics 4000

Color LCD 1280 x 800

System Software: ℹ️

OS X 10.10.3 (14D136) - Time since boot: 0:16:21

Disk Information: ℹ️

APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)

EFI (disk0s1) <not mounted> : 210 MB

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

Macintosh HD (disk1) / : 498.89 GB (242.14 GB free)

Core Storage: disk0s2 499.25 GB Online

HL-DT-ST DVDRW GS41N

USB Information: ℹ️

Apple Computer, Inc. IR Receiver

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. Apple Internal Keyboard / Trackpad

Logitech USB Receiver

Apple Inc. FaceTime HD Camera (Built-in)

Thunderbolt Information: ℹ️

Apple Inc. thunderbolt_bus

Gatekeeper: ℹ️

Anywhere

Kernel Extensions: ℹ️

/Library/Extensions

[loaded] at.obdev.nke.LittleSnitch (4234 - SDK 10.8) [Click for support]

Launch Agents: ℹ️

[running] at.obdev.LittleSnitchUIAgent.plist [Click for support]

[running] com.bjango.istatmenusagent.plist [Click for support]

[running] com.bjango.istatmenusnotifications.plist [Click for support]

Launch Daemons: ℹ️

[running] at.obdev.littlesnitchd.plist [Click for support]

[loaded] com.adobe.fpsaud.plist [Click for support]

[running] com.bjango.istatmenusdaemon.plist [Click for support]

[loaded] com.microsoft.office.licensing.helper.plist [Click for support]

User Launch Agents: ℹ️

[loaded] com.bittorrent.uTorrent.plist [Click for support]

[loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Click for support]

[loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Click for support]

User Login Items: ℹ️

Dropbox Application Hidden (/Applications/Dropbox.app)

Stickies Application (/Applications/Stickies.app)

Meteorologist Application (/Applications/Meteorologist.app)

XMenu Application (/Applications/XMenu.app)

BirdDrop Application (/Applications/BirdDrop.app)

FaceboxPro Application (/Applications/FaceboxPro.app)

Internet Plug-ins: ℹ️

FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]

QuickTime Plugin: Version: 7.7.3

Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]

Default Browser: Version: 600 - SDK 10.10

SharePointBrowserPlugin: Version: 14.4.9 - SDK 10.6 [Click for support]

Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]

VLC Plugin: Version: 2.2.1 [Click for support]

Safari Extensions: ℹ️

1Password

Pin It Button

3rd Party Preference Panes: ℹ️

Flash Player [Click for support]

Time Machine: ℹ️

Time Machine not configured!

Top Processes by CPU: ℹ️

12% WindowServer

7% firefox

2% fontd

1% Little Snitch Agent

0% taskgated

Top Processes by Memory: ℹ️

900 MB kernel_task

459 MB firefox

164 MB mds_stores

164 MB mdworker(8)

131 MB FaceboxPro

Virtual Memory Information: ℹ️

11.00 GB Free RAM

4.76 GB Used RAM

0 B Swap Used

Diagnostics Information: ℹ️

May 5, 2015, 03:30:58 PM Self test - passed

May 5, 2015, 03:26:05 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-05-05-152605_[redac ted].crash

May 5, 2015, 01:50:34 PM /Library/Logs/DiagnosticReports/CleanMyMac 2_2015-05-05-135034_[redacted].cpu_resource.diag [Click for details]

May 5, 2015, 01:47:45 PM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-13 4745_[redacted].crash

May 5, 2015, 02:57:23 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 5723_[redacted].crash

May 5, 2015, 02:55:22 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 5522_[redacted].crash

May 5, 2015, 02:52:10 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 5210_[redacted].crash

May 5, 2015, 02:43:08 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 4308_[redacted].crash

May 5, 2015, 02:38:52 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 3852_[redacted].crash

May 5, 2015, 02:38:20 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 3820_[redacted].crash

May 5, 2015, 02:37:44 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 3744_[redacted].crash

May 5, 2015, 02:36:27 AM /Users/[redacted]/Library/Logs/DiagnosticReports/Finder_2015-05-05-023627_[reda cted].crash

May 5, 2015, 02:36:13 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-02 3613_[redacted].crash

May 5, 2015, 01:29:02 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-01 2902_[redacted].crash

May 5, 2015, 01:24:12 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-01 2412_[redacted].crash

May 5, 2015, 01:17:13 AM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-05-01 1713_[redacted].crash

May 5, 2015, 12:34:16 AM /Library/Logs/DiagnosticReports/firefox_2015-05-05-003416_[redacted].cpu_resour ce.diag [Click for details]

May 4, 2015, 11:11:42 PM /Library/Logs/DiagnosticReports/Finder_2015-05-04-231142_[redacted].hang

May 4, 2015, 02:17:01 AM /Library/Logs/DiagnosticReports/firefox_2015-05-04-021701_[redacted].cpu_resour ce.diag [Click for details]

May 3, 2015, 09:02:10 PM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-03-21 0210_[redacted].crash

May 3, 2015, 07:37:11 PM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-03-19 3711_[redacted].crash

May 3, 2015, 12:40:36 PM /Library/Logs/DiagnosticReports/CleanMyMac 2_2015-05-03-124036_[redacted].cpu_resource.diag [Click for details]

May 3, 2015, 06:39:03 AM /Library/Logs/DiagnosticReports/softwareupdated_2015-05-03-063903_[redacted].cr ash

May 3, 2015, 01:59:03 AM /Library/Logs/DiagnosticReports/firefox_2015-05-03-015903_[redacted].cpu_resour ce.diag [Click for details]

May 2, 2015, 11:08:55 PM /Library/Logs/DiagnosticReports/Microsoft Word_2015-05-02-230855_[redacted].hang

May 2, 2015, 11:07:32 PM /Library/Logs/DiagnosticReports/Microsoft Word_2015-05-02-230732_[redacted].cpu_resource.diag [Click for details]

May 2, 2015, 10:24:19 PM /Library/Logs/DiagnosticReports/Microsoft Word_2015-05-02-222419_[redacted].cpu_resource.diag [Click for details]

May 2, 2015, 10:00:50 PM /Users/[redacted]/Library/Logs/DiagnosticReports/Finder_2015-05-02-220050_[reda cted].crash

May 2, 2015, 09:58:53 PM /Library/Logs/DiagnosticReports/firefox_2015-05-02-215853_[redacted].cpu_resour ce.diag [Click for details]

May 2, 2015, 09:46:08 PM /Library/Logs/DiagnosticReports/firefox_2015-05-02-214608_[redacted].hang

May 2, 2015, 09:45:54 PM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-05-02-21 4554_[redacted].crash