Although this is technically a blog, it's primary content is a series of articles on how to get Firefox working in a corporate Windows environment. Later ones build on earlier ones, so you might want to use the Table of Contents on the right to read through it chronologically instead of reading straight down from here.
Me again. Now the instructions are complete for moving to Firefox 48 and beyond. I have a write up on how to get your customized extensions signed and I updated the instructions for editing IE Tab v2 and XMarks. I've pushed them both out along with Firefox 49.0.1 at my organization and everything is running smoothly.
- Greg on 10/13/2016