Hi

You should be able to do this from the Firefox for Android menu under Settings and Notifications

I hope that this helps.

You can disable notifications, but does this disable requests from sites to allow notifications?

Obviously Firefox can't prevent sites from creating their own pop-ups, but it seems to me that I am still getting requests for push notification permission from Firefox, though I wouldn't 100% rule out that sites have managed to trick me into thinking I was looking at a Firefox push notification requests pop-up which was in fact from the site.

(Edit) I have all notifications disabled and am still seeing these.

If you open Site Permissions in the Settings menu, you should be able to set Notifications to blocked which should help.

I have all notifications disabled, and am not seeing notifications, what I am seeing continually are requests to allow notifications for a given site I've visited.

Here is a discussion of the issue and a solution which does not work for Android because about:config is disabled.

https://superuser.com/questions/1297533/turn-off-allow-notifications-pop-up-in-firefox

For testing here is a random test push notifications website, https://www.bennish.net/web-notifications.html

Clicking on "authorise" prompts Firefox to show a popup asking if I want to allow push notifications for this site. This is just a JavaScript function called by the site. The problem is that a seemingly ever increasing proportion of websites make this JavaScript call upon you visiting them. It should be possible for Android users to be able to disable all of these pop-ups from ever being shown like desktop users can.