this seems like a really odd choice. admittedly the old name wasn’t great, it sounded like spreadsheet software.
but they’ve gone from a name that was the top search result to one that will never be, because the current top search result for “firefish” is a recruitment company that can put a lot more money into seo than they can; and a name that most people who would use it (techies & early adopters) will immediately assume is a firefox fork or mozilla product
in isolation it’s not a bad name, and i really like the new logo; but it just seems like a poor choice