I found myself needing to download a whole bunch of JSON data from a server that had a weird authentication thing that Chrome could deal with but wget/curl/Ruby couldn’t. Since my Firefox was on the fritz, I couldn’t use Selenium IDE or the Selenium Webdriver. iMacros to the rescue! (Chrome, Firefox)
That plus lots of keyboard macros and text manipulation in Emacs, plus a little parsing and regexp substitution in Ruby, plus more Emacs munging got me the data I wanted. Hooray for bubblegum and string scripting!