Zoho compatible with latest browsers?

Zoho compatible with latest browsers?

Dear Zoho team,

I would just like to know whether it is safe for me and my many Zoho users to upgrade our browsers. Currently we are at Firefox 5 and IE9, and new versions seem to be coming out at a faster pace than in the past.I don't want us to lose any important areas of functionality but I know it is a challenge for many online application companies to stay up to date with new releases. 

I can't find any area of your site that tells me you've tested or certified that your application works with particular versions of the most popular browsers.  Other companies seem to do this.  Please let me know if you have such a page, and if you don't, please consider making one.

For the future, is it a generally good idea to keep one's browser up to date when using Zoho? When a new version (no longer beta) is officially released, should we wait a while?  Over time does Zoho drop its support of older versions of these browsers? 

Thank you