Everytime when i open the browser, it pop up a browser game

Question

hi guys i just recently update to win8, and i install firefox on my computer few days ago. but then i found a problem, everytime when i open the browser, it pop up a aircraft shooting game on the website(definitely not the website problem, because i tried to use different website as the home page, the problem still exist) then i install the adblock and all those ad ons to prevent this but still doesnt work. now i am so frustrated, everytime when i open the browser i have to hear the shooting sound. can somebody plz help me to fix/ uninstall this problem, many thanks. P.S. i dont know how to upload the pic from this post, if i can do it, it will have a much better idea of what i am saying -.-

Answer 1

thx for the quick reply and here is the information:
Application Basics
Name: Firefox
Version: 28.0
User Agent: Mozilla/5.0 (Windows NT 6.2; rv:28.0) Gecko/20100101 Firefox/28.0
Crash Reports for the Last 3 Days
Report ID: bp-f34ed7cd-faaf-408f-85a6-976322140402
Submitted: 3 days ago
All Crash Reports
Extensions
Name: Adblock Plus
Version: 2.5.1
Enabled: true
ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
Name: avast! Online Security
Version: 9.0.2013.75
Enabled: true
ID: [email protected]
Name: Easy Screen Shot
Version: 0.3.2.2
Enabled: true
ID: [email protected]
Name: Flashblock
Version: 1.5.17
Enabled: true
ID: {3d7eb24f-2740-49df-8937-200b1cc08f8a}
Name: NetVideoHunter
Version: 1.15
Enabled: true
ID: [email protected]
Name: Quick Locale Switcher
Version: 1.7.8.5
Enabled: true
ID: {25A1388B-6B18-46c3-BEBA-A81915D0DE8F}
Name: Quiknowledge
Version: 1.9.0.1
Enabled: false
ID: [email protected]
Important Modified Preferences
accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.disk.smart_size_cached_value: 358400
browser.places.smartBookmarksVersion: 6
browser.privatebrowsing.autostart: true
browser.sessionstore.upgradeBackup.latestBuildID: 20140314220517
browser.startup.homepage: https://www.google.com/
browser.startup.homepage_override.buildID: 20140314220517
browser.startup.homepage_override.mstone: 28.0
dom.mozApps.used: true
extensions.lastAppVersion: 28.0
network.cookie.prefsMigrated: true
places.database.lastMaintenance: 1396563985
places.history.expiration.transient_current_max_pages: 80270
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.cpd.offlineApps: true
privacy.cpd.siteSettings: true
privacy.sanitize.migrateFx3Prefs: true
privacy.sanitize.timeSpan: 0
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1395842963
user.js Preferences
Your profile folder contains a user.js file, which includes preferences that were not created by Firefox.
Graphics
Adapter Description: Mobile Intel(R) 965 Express Chipset Family (Microsoft Corporation - WDDM 1.1)
Adapter Drivers: igdumd32 igd10umd32
Adapter RAM: Unknown
Device ID: 0x2a02
Direct2D Enabled: Blocked for your graphics driver version.
DirectWrite Enabled: false (6.2.9200.16581)
Driver Date: 10-1-2012
Driver Version: 8.15.10.2697
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 9
Vendor ID: 0x8086
WebGL Renderer: Google Inc. -- ANGLE (Mobile Intel(R) 965 Express Chipset Family (Microsoft Corporation - WDDM 1.1) Direct3D9Ex vs_3_0 ps_3_0)
windowLayerManagerRemote: false
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0
JavaScript
Incremental GC: true
Accessibility
Activated: false
Prevent Accessibility: 0
Library Versions
NSPR
Expected minimum version: 4.10.3
Version in use: 4.10.3
NSS
Expected minimum version: 3.15.5 Basic ECC
Version in use: 3.15.5 Basic ECC
NSSSMIME
Expected minimum version: 3.15.5 Basic ECC
Version in use: 3.15.5 Basic ECC
NSSSSL
Expected minimum version: 3.15.5 Basic ECC
Version in use: 3.15.5 Basic ECC
NSSUTIL
Expected minimum version: 3.15.5
Version in use: 3.15.5