When you are always redirected to the webpage tfa5e.top when you open your browser, there is an adware in your system. You may have unknowingly installed this adware through bundled apps or software (free games, plugins, toolbars, etc.) that you’ve downloaded from the Internet.
Tfa5e.top is an adware that will attempt to commandeer your browser search and homepage. It is an advertising network that will send you to suspicious or malicious websites to get money from you or infect your computer further. Moreover, every time you browse, a slew of intrusive pop-ups and unwanted ads will appear. The adware has found its way into your computer that may prevent you from changing your settings back thus you have to remove it immediately.