I just found the ZD error console. When I click a link, hoping to get Firefox to start, I see a bunch of errors in the Error Console. This one looks interesting:
Does this give any clues as to the source of my problem? Thanks!
Error: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIExternalProtocolService.loadURI]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://webrunner/content/webrunner.js :: anonymous :: line 516" data: no]
Source File: chrome://webrunner/content/webrunner.js