How are those Chrome extensions doin’ for ya?

I use Chrome Beta full-time. This fellow has a big selection of  ’em on his Chrome beta.  Meanwhile, I was trying to figure out what has caused the periodic “Gmail has failed to load” error messages.  I think those might be as a result of Gmail Lab features that were checked, and not Chrome browser extensions. Update: It’s not.  Off to Firefox.  Email to Marissa.  Hope to get a reply.