Mozilla sent a template email and you're acting like they did anything beyond that. They didn't even assure the author that their add-on wouldn't be removed without prior two-way communication ever again.
Mozilla has a press page -- they could issue a clear, open press release talking about what went wrong, how they're changing going forward, etc. They could even acknowledge that this extension is awesome and contribute capital to making it available to their users.
But, instead, they did the minimum amount possible to save face after one of their reviewers royally messed up. The things the reviewer cited in the first review are plainly wrong and a junior JS developer could tell you that.
Heck, an AI reviewer would have done better (ChatGPT 4o mini):
"No, this file does not appear to contain minified code. Minified code is typically compressed to remove all unnecessary characters such as whitespace, line breaks, and comments to reduce the file size, making it harder to read.
The code you provided contains readable formatting, including comments, indentation, and well-structured functions, which are not characteristics of minified code."