MacBook – Glitch / Blink video on OSX (Macbook pro 15′ mid-2012 no retina) and firefox 40+

I currently have a problem with my macbook 15' mid-2012 (No retina) with Yosemite. When I watch videos (e.g. Youtube) via Firefox, sometime for a microsecond the video becomes blue then comes back to the original color. This problem happens randomly; therefore I have no idea if it's come from Firefox, Youtube or my macbook. I tried with safari and this problem didn't happen, but I can be sure.

Moreover, other problems have appeared at exactly same time. It might have a link. My macbook has accidentally rebooted and hasn't produced a log. Finder has accidentally stopped and hasn't been not able to restart.

I have did a complete reinstallation of OS X but the problem is still there. I have also execute an Apple Hardware Test, but all seems ok. Yet I have suspicion of a bad RAM or GPU. All my softwares are up to date.

Finder error report :

Process:               Finder [1081]
Path:                  /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
Identifier:            Finder
Version:               ???
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Finder [1081]
User ID:               501

Date/Time:             2015-10-04 13:57:14.046 +0200
OS Version:            Mac OS X 10.10.5 (14F27)
Report Version:        11
Anonymous UUID:        55A7EE98-4ECA-E59F-CC25-4FADA49D6699

Sleep/Wake UUID:       EF4D15D8-E4F2-41A7-9680-E50081FD2B9D

Time Awake Since Boot: 42000 seconds
Time Since Wake:       2400 seconds

Crashed Thread:        0

Exception Type:        EXC_BREAKPOINT (SIGTRAP)
Exception Codes:       0x0000000000000002, 0x0000000000000000

Application Specific Information:
dyld: launch, loading dependent libraries

Dyld Error Message:
  Library not loaded: /System/Library/PrivateFrameworks/Suggestions.framework/Versions/A/Suggestions
  Referenced from: /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
  Reason: malformed mach-o image: load command #22 length (0) too small in /System/Library/PrivateFrameworks/Suggestions.framework/Versions/A/Suggestions

Binary Images:
    0x7fff6db81000 -     0x7fff6dbb7887  dyld (353.2.3) <B1B370A5-479F-3533-8AD7-97B687D4F989> /usr/lib/dyld
    0x7fff8d119000 -     0x7fff8d228ff3  com.apple.desktopservices (1.9.3 - 1.9.3) <FEE11342-5BC4-37A7-8169-DA48BE17B9C9> /System/Library/PrivateFrameworks/DesktopServicesPriv.framework/Versions/A/DesktopServicesPriv
    0x7fff8d39f000 -     0x7fff8d417ff7  com.apple.SystemConfiguration (1.14.4 - 1.14) <3DFFD7F7-BD23-3F4C-A209-C4A0D99F6573> /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration
    0x7fff8e708000 -     0x7fff8e7aafff  com.apple.Bluetooth (4.3.6 - 4.3.6f3) <E5DC1699-2727-329C-A843-C80CE9A6CD7B> /System/Library/Frameworks/IOBluetooth.framework/Versions/A/IOBluetooth
    0x7fff8eefe000 -     0x7fff8ef05fff  com.apple.NetFS (6.0 - 4.0) <C263C8F8-F284-3101-AC82-A97A81716063> /System/Library/Frameworks/NetFS.framework/Versions/A/NetFS
    0x7fff8ef06000 -     0x7fff8f170ff7  com.apple.imageKit (2.6.1 - 850) <612201FE-768E-386B-82E3-764038B40120> /System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Versions/A/ImageKit
    0x7fff8f283000 -     0x7fff8f343ff7  com.apple.backup.framework (1.6.5 - 1.6.5) <86396038-33EA-3046-9F70-093A3D6407D4> /System/Library/PrivateFrameworks/Backup.framework/Versions/A/Backup
    0x7fff8fa83000 -     0x7fff8fae0fff  com.apple.QuickLookFramework (5.0 - 675.43) <506D60B4-B188-3D0A-9187-0404A60A9B06> /System/Library/Frameworks/QuickLook.framework/Versions/A/QuickLook
    0x7fff90736000 -     0x7fff90756fff  com.apple.IconServices (47.1 - 47.1) <E83DFE3B-6541-3736-96BB-26DC5D0100F1> /System/Library/PrivateFrameworks/IconServices.framework/Versions/A/IconServices
    0x7fff9075b000 -     0x7fff90798ff3  com.apple.bom (14.0 - 193.6) <3CE5593D-DB28-3BFD-943E-6261006FA292> /System/Library/PrivateFrameworks/Bom.framework/Versions/A/Bom
    0x7fff913f9000 -     0x7fff915a9ff3  com.apple.QuartzCore (1.10 - 361.19) <F815B60E-75E3-3263-BE93-27A49882CF58> /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
    0x7fff929f9000 -     0x7fff92a07ff7  com.apple.opengl (11.1.2 - 11.1.2) <5F355713-4637-33CD-9CBA-4B4CA43FB0FE> /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
    0x7fff9314d000 -     0x7fff93237ff7  com.apple.QuickLookUIFramework (5.0 - 675.43) <011DEB49-0FB3-3E44-9D99-D89ADD59A3CC> /System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/QuickLookUI.framework/Versions/A/QuickLookUI
    0x7fff9608a000 -     0x7fff9626fff7  libicucore.A.dylib (531.48) <3CD34752-B1F9-31D2-865D-B5B0F0BE3111> /usr/lib/libicucore.A.dylib
    0x7fff965f4000 -     0x7fff96620fff  com.apple.framework.SystemAdministration (1.0 - 1.0) <9F77597C-BAB8-3D86-B6CC-96D54D89E6AE> /System/Library/PrivateFrameworks/SystemAdministration.framework/Versions/A/SystemAdministration
    0x7fff96954000 -     0x7fff96983ff7  com.apple.CommerceKit (1.2.0 - 376.29) <FC810A52-983A-3F19-89C0-3EBB464990C4> /System/Library/PrivateFrameworks/CommerceKit.framework/Versions/A/CommerceKit
    0x7fff979b7000 -     0x7fff97a05ff7  com.apple.ImageCaptureCore (6.3 - 6.3) <75B5043C-9EF0-3CD2-875D-12813F0A73D3> /System/Library/Frameworks/ImageCaptureCore.framework/Versions/A/ImageCaptureCore
    0x7fff97a06000 -     0x7fff97a06fff  com.apple.CoreServices (62 - 62) <C69DA8A7-B536-34BF-A93F-1C170E2C6D58> /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
    0x7fff98752000 -     0x7fff987c4fff  com.apple.framework.IOKit (2.0.2 - 1050.20.2) <09C0518C-90DF-3FC3-96D6-34D35F72C8EF> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
    0x7fff9aa67000 -     0x7fff9ab8fff7  com.apple.coreui (2.1 - 308.6) <9E0E9C6A-68F5-34C1-A17C-96226D401D4D> /System/Library/PrivateFrameworks/CoreUI.framework/Versions/A/CoreUI
    0x7fff9c278000 -     0x7fff9c27dfff  com.apple.DiskArbitration (2.6 - 2.6) <0DFF4D9B-2AC3-3B82-B5C5-30F4EFBD2DB9> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
    0x7fff9ccd4000 -     0x7fff9ccd4fff  com.apple.ApplicationServices (48 - 48) <5BF7910B-C328-3BF8-BA4F-CE52B574CE01> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices

Model: MacBookPro9,1, BootROM MBP91.00D3.B0B, 4 processors, Intel Core i7, 2.3 GHz, 4 GB, SMC 2.1f175
Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In
Graphics: NVIDIA GeForce GT 650M, NVIDIA GeForce GT 650M, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54333235533643465238432D50422020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54333235533643465238432D50422020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF5), Broadcom BCM43xx 1.0 (7.15.166.24.3)
Bluetooth: Version 4.3.6f3 16238, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD TOSHIBA MK5065GSXF, 500,11 GB
Serial ATA Device: MATSHITADVD-R   UJ-8A8
USB Device: Hub
USB Device: FaceTime HD Camera (Built-in)
USB Device: Hub
USB Device: Hub
USB Device: IR Receiver
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Apple Internal Keyboard / Trackpad
Thunderbolt Bus: MacBook Pro, Apple Inc., 25.1

Could you help me in this matter ? Thank you.