The FunSafeTab Web browser extension is a dodgy utility that is not likely to provide you with any helpful tools or unique features. However, this is not the case, and you should not install the FunSafeTab add-on.
The FunSafeTab Web browser extension is listed as a PUP (Potentially Unwanted Program) by cybersecurity researchers. This is because this dodgy Web browser add-on will tamper with your system's settings automaticlly. This behavior is a red flag because genuine applications will not apply any changes to your configurations without getting your explicit consent first. The FunSafeTab extension will alter your settings to set the 'Search.funsafetabsearch.com' as your default new tab page. This affiliated website hosts a basic search engine that is not likely to provide you with the high-quality services you may be used to. This is because this search engine is not likely to deliver the organic results to your search queries, as sponsored content may be favored. The sponsored content may include low-quality products and fake services, so it is advisable to avoid it.
Since the FunSafeTab Web browser extension is a PUP, it is best to remove it from your computer. This can be done manually, or you can trust the services of a reputable anti-virus tool that will locate and remove the FunSafeTab add-on.