CFCs, HCFCs, and Halon: The ozone layer is destroyed by CFC's, chlorofluorocarbons, that are used as a propellant in aerosol cans, and refrigerants in older cars and refrigerators. When Chlorofluorocarbons (Freon and other CFCs) and Bromofluorocarbons (Halons) they became popular refrigerants and fire fighting agents.
Anyways, let's come to out topic. Yahoo! Browser. Yahoo is the No.1 site on the web. Having the maximum traffic, it's still ruling in the laexa rank. Now, just to get all it's pages open properly and work nicely, Yahoo! joined hands with Microsoft in making a Yahoo! friendly browser. And here it is, YAHOO! Browser.
Yahoo to replace Google as default search engine on Firefox in US. Mozilla is ending its decade-old partnership with Google in the US, and making Yahoo its default search engine. Yahoo is replacing Google as the default search engine for the Mozilla Firefox web browser on mobile and desktop in the United States, the company has announced. The switchover will take place in the US in December, putting an end to a decade-old partnership between Google and the Mozilla Foundation.