Reading the comments here reconfirms that I had a good idea not using the FB app on my phone—using inside Firefox it is, of necessity, less pushy. If you want

Reading the comments here reconfirms that I had a good idea not using the FB app on my phone—using inside Firefox it is, of necessity, less pushy. If you want to use FB messages without the crapfest, note that using the url mbasic dot facebook dot com will get you a text-minimalist version of the site (designed for very old mobiles) where you can receive messages without the app. (No push notifications, but afaic that's a feature.)