Review for Mail Merge by Bionicgrape
Rated 5 out of 5 stars
There is an unspecified limit on the number of email addresses it will support. If you don't know this and just keep trying to add the .csv file as a data source, you'll think the add-on doesn't work. I tried a .csv list with 407 names and I had to break it into 4 separate files to get it to work. Other than that, it works great; the documentation could be a bit better, that's all.
This review is for a previous version of the add-on (1.1.0).To create your own collections, you must have a Mozilla Add-ons account.