-> Tap ALT key or press F10 to show the Menu Bar

-> go to Help Menu -> select "Restart with Add-ons Disabled"

Firefox will close then it will open up with just basic Firefox. Now do this:

-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/

-> go to View Menu -> Toolbars -> unselect All Unwanted toolbars

-> go to Tools Menu -> Options -> Security -> place Checkmarks on:

1) Warn me when sites try to install add-ons

2) Block reported attack sites

3) Block reported web forgeries

-> Click OK on Options window

-> click the Favicon (small drop down menu icon) on Firefox SearchBar (its position is on the Right side of the Address Bar) -> click "Manage Search Engines" -> select all Unwanted Search Engines and click Remove -> click OK

-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox

You can enable your Known & Trustworthy Add-ons later. Check and tell if its working.

doesnt work for me....

This process seems to be related to a hardware proxy server, and may be something your Internet service provider uses or may be a feature of your router. You'll need to find the extension that is responsible and disable it, find the program that installed it in Control Panel>Programs and Features, or find the service running in Windows Services (WindowsKey+R, type services.exe, hit Enter). In the search bar at the bottom of your Windows start menu, search for EDGE-FX to find the associated program that may contain relevant settings to disable the proxy. If you installed software provided by your ISP, it is probably the culprit.