Firefox's spellchecking is just generally awful, even for English. It fails to recognize even basic words such as 'surveil' with the closest suggestion being 'survive'. I've found several other words I wanted to use that weren't found too. I have spellcheck off by default but when I write something long I do a quick check at the end so I don't normally notice this.
Firefox is by far my least favorite piece of software that I regularly use and I've considered throwing my computer out the window because of it.
Firefox is by far my least favorite piece of software that I regularly use and I've considered throwing my computer out the window because of it.