I don't mean anonymously so much as I mean turn off JavaScript, Flash, and anything else that potentially has a virus. I recognize the UX goes way down, but that's one reason this has to be easy.
Do any browsers support a mode for surfing the web on untrusted sites in such a manner? IE it seems you need to check 20 different options or go into a menu 7 clicks deep. This is not what I am looking for.
Does any browser support a 1 click toggling approach?
Not out of the box, no.
However, there are addons which will do this. The most popular and well-done of these is NoScript. NoScript will block all script execution, plugins (Flash, Java, etc.) unless the origin domain has been whitelisted by you. This will break some websites, but you can always select "Temporarily Allow example.com" from NoScript's menu to allow a particular domain for the session. It also offers some other hardening features.
NoScript is exclusively for Firefox, however a version for Chrome called NotScripts is available.
