increase security on iceCat browser

Components
GNU IceCat is an app for browsing that was originally called iceweasel, iceCat browser application originally created for linux operating system, but as the development of this application, now this application is also available for windows operating system, this app is an open source or free app, this application is very light not much use of RAM, for those of you who use computer with less RAM, I suggest you to use this browser as browser your default. but do you know this application is very vulnerable to viruses or spyware when the process of browsing running.
Proposal
my proposal to this app to improve security, because often the default search engine changed when exposed to the virus, so the search engine changed into search engine that we do not want, this is very common in IceCat browser so I suggest to be improved again.
Mockups / Examples
BEFORE:

this is the default view of security on iceCat
AFTER:

in this picture I have added two security features that are very useful for this application, because I see all other browsers like google chrome, mozila firefox has anti virus feature.
Benefits
the benefits that we can get if my proposal is implemented is this browser becomes more secure because we do not find another search enggine that changed itself with fake enggine search, and malicious spyware that infects browser iceCat
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[utopian-moderator]
Excelent post. I will try to instal iceCat browser.
Gretting from Venezuela.