I will share some tips and tricks that will make Firefox run more smoothly with iMacros.
1. Install uBlock Origin addon
uBlock Origin is just like Adblock but its easier on your computers CPU and memory resources. This addon will block unnecessary ads and scripts when visiting a website in return the pages will load faster and make for a much smoother experience when running your scripts.
2. Disable Firefox Health Report & Crash Reporter
This disables annoying crash popups that accomplish nothing.
Go into Firefox Options > Advanced > Data Choices
Make sure the boxes are unchecked for Firefox Health Report & Crash Reporter