firefox + better errors + emacs => click to fix error!

ffemacs

#!/usr/bin/env ruby

chunk = ARGV.join

head, line  = chunk.split("&line=")
trash, file = head.split("file://")
file = file.gsub!("%2F", "/")

args =  `ps aux | grep emac[s]` == "" ? "c" : ""

# puts "Running file #{file} ##{line} with args #{args}"
`emacsclient -n#{args} +#{line} "#{file}"`

firefox about:config

Create a **BOOLEAN** key:

network.protocol-handler.expose.emacs;false

Create bin/ffemacs on your $HOME, and add that key BOOLEAN in firefox.