I'm sorry you've been infected with this virus. Let's help you remove it.

Please follow these steps in this order:

• Troubleshoot Firefox issues caused by malware
• Update Firefox to the latest release
• Refresh Firefox - reset add-ons and settings
• Then set your home page to whatever you want, How to set the home page

Download the Mozilla Search Reset {web link} This add-on is very simple: on installation, it backs up and then resets your search preferences and home page to their default values, and then uninstalls itself. This affects the search bar, URL bar searches, and the home page.

I tried, reset firefox, make the default home page.everything not working.Still i have my issue

You should always pay attention when installing software because often, a software installer includes optional installs, such as this adware. Be very careful what you agree to install.
Adware gets on your computer after you have installed a freeware software (video recording/streaming, download-managers or PDF creators) that had bundled into their installation this browser hijacker.

You can use the below steps to revert back to adware-less Firefox.

1) Reset Prefs

• Navigate to about:config in your Address Bar
• Press the "I'll be careful, I promise!" button to proceed
• Search for omiga and reset all prefs that pull up by right clicking > Reset

2) Remove any programs that you don't recognize or remember installing from your Control Panel (Start > Control Panel > Uninstall a Program)

3) Remove any extensions that you don't recognize or remember installing from Firefox.

• Firefox 29 and above:(Press the menu button (The image "new fx menu" does not exist. > Add-ons > Extensions)
• Firefox 28 and below:(Go to the orange Firefox button > Add-ons > Extensions)

4) Download ADW Cleaner to wipe out any remnants of the adware.

• http://www.bleepingcomputer.com/download/adwcleaner/

5) Do a malware check with some malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware.
All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

• Malwarebytes' Anti-Malware:
  http://www.malwarebytes.org/mbam.php
• SuperAntispyware:
  http://www.superantispyware.com/
• Microsoft Safety Scanner:
  http://www.microsoft.com/security/scanner/en-us/default.aspx
• Windows Defender: Home Page:
  http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
• Spybot Search & Destroy:
  http://www.safer-networking.org/en/index.html
• Kasperky Free Security Scan:
  http://www.kaspersky.com/security-scan

You can also do a check for a rootkit infection with TDSSKiller.

• Anti-rootkit utility TDSSKiller:
  http://support.kaspersky.com/5350?el=88446

See also:

• "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

I have tried about:config, search for omiga...nothing is there.Also I tried some spyware cleaners also.nothing solved my problem.

Can you send me your troubleshooting information from the Firefox installation that's having issues? This is a good part in troubleshooting.

• Navigate to about:support via Address Bar
• Click the button that says Copy text to clipboard
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

Application Basics

Name: Firefox Version: 30.0 User Agent: Mozilla/5.0 (Windows NT 6.1; rv:30.0) Gecko/20100101 Firefox/30.0

Crash Reports for the Last 3 Days

All Crash Reports

Extensions

Name: Firefox Synchronisation Extension Version: 1.7.56.205 Enabled: false ID: fe_7.0@nokia.com

Important Modified Preferences

browser.cache.disk.capacity: 358400 browser.cache.disk.smart_size_cached_value: 358400 browser.cache.disk.smart_size.first_run: false browser.cache.disk.smart_size.use_old_max: false browser.places.smartBookmarksVersion: 7 browser.sessionstore.upgradeBackup.latestBuildID: 20140605174243 browser.startup.homepage: about:home browser.startup.homepage_override.buildID: 20140605174243 browser.startup.homepage_override.mstone: 30.0 dom.mozApps.used: true extensions.lastAppVersion: 30.0 gfx.direct3d.last_used_feature_level_idx: 1 network.cookie.prefsMigrated: true places.database.lastMaintenance: 1406008207 places.history.expiration.transient_current_max_pages: 50066 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.migrateFx3Prefs: true storage.vacuum.last.index: 0 storage.vacuum.last.places.sqlite: 1406008207

Graphics

Adapter Description: Intel(R) HD Graphics Adapter Drivers: igdumdx32 igd10umd32 Adapter RAM: Unknown Device ID: 0x0046 Direct2D Enabled: true DirectWrite Enabled: true (6.1.7600.16972) Driver Date: 8-31-2011 Driver Version: 8.15.10.2509 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 10 Vendor ID: 0x8086 WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: false AzureCanvasBackend: direct2d AzureContentBackend: direct2d AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.6 Version in use: 4.10.6

NSS Expected minimum version: 3.16 Basic ECC Version in use: 3.16 Basic ECC

NSSSMIME Expected minimum version: 3.16 Basic ECC Version in use: 3.16 Basic ECC

NSSSSL Expected minimum version: 3.16 Basic ECC Version in use: 3.16 Basic ECC

NSSUTIL Expected minimum version: 3.16 Version in use: 3.16

Did you try the Mozilla Search Reset I told you about; https://support.mozilla.org/en-US/questions/1011664#answer-606328

Look thru your add-ons list and make sure you know what each one is there for. Also, check the programs that are on your computer

Windows: Start > Control Panel > Uninstall Programs. Mac: Open the "Applications" folder Linux:

• Ubuntu Unity {web link}
• Xfce: Applications Menu category sections
• options depends on the package manager and the desktop environment

Go thru the list. If you find something that you don't know what it is, use a web search.

Troubleshoot Firefox Issues Caused By Malware {web link}