My firefox browser is hijacked by duba.com, how to fix,

Hello Paul,
Sorry for the inconvenience caused.  
Have you scanned your system using AVG Internet Security?
Our AVG program is capable of detecting and removing the malware programs, however there are numerous number of malware programs emerging day by day and we are working 24/7 to add all those definitions to our database. We request you to start uninstalling all unknown, unnecessary programs from your computer, make sure you don't uninstall the windows programs. Also remove all the weird, unwanted add-ons, plugins, extensions, tool bars and search bars from your web browsers, if the issue persists, reset your browsers once. This should fix your issue.
Please feel free to contact us should you need any assistance.
Thank you.

my firefox browser is hijacked by duba.com, how to fix, can avg fix it

Hello Paul,
Sorry for the inconvenience caused.  
Have you scanned your system using AVG Internet Security?
Our AVG program is capable of detecting and removing the malware programs, however there are numerous number of malware programs emerging day by day and we are working 24/7 to add all those definitions to our database. We request you to start uninstalling all unknown, unnecessary programs from your computer, make sure you don't uninstall the windows programs. Also remove all the weird, unwanted add-ons, plugins, extensions, tool bars and search bars from your web browsers, if the issue persists, reset your browsers once. This should fix your issue.
Please feel free to contact us should you need any assistance.
Thank you.