Great question. What matters is the outcome, not the mechanism. It is the modification of the functionality of Slack’s product which is at issue. Most extension

Great question. What matters is the outcome, not the mechanism. It is the modification of the functionality of Slack’s product which is at issue. Most extensions don’t do that in any substantial manner. Furthermore, in a civil suit what needs to be demonstrated are actual damages to their business. (It’s not enough to just show that the ToS were violated). There’s no possibility of that for most browser extensions.