How can remove ads in browser / Remove ads in browsers

You seeing Unwanted ads when you open any website ?
Ok some times no application will not find in control panels also I faced this problem,

When I opened ecommerce portals in Mozila showing many ads but that ads not from websites, It is only local system will display ads in browsers


So I have good 3 steps it is very Useful to everyone

1.  Open add-ons check once if added any addons, If you have addons please disable once
2. Go to check control panel and check once any unwanted applications installed? if installed please remove it.
3. Very Important : If showing any Unwanted applications in START MENU please right click find 'file path' go and delete that folder.
4.  Once restart your system

Some times if not uninstall in control panel also no problem 3rd Point will work perfectly.