How to disable Mozilla Firefox pop ups

Do they look like these? support.mozilla.org/questions/1459930

The help article Web Push notifications in Firefox has the steps how to revoke these permissions.

I just the same pop asking if it was like this and they are

So if you follow support.mozilla.org/en-US/kb/push-notifications-firefox#w_manage-the-notifications-permission-for-all-websites you can remove the sites you no longer want to subscribe to, or adjust the settings further.

I follow this workflow and end up looking at 2 addresses that I use for deliveries 1. Click the menu button and select Settings. 2. Click Passwords and autofill on the left and scroll down to the Addresses and more section. 3. Click the Manage addresses and more button. o Add…: Enter a new address using this button. o Edit…: Select the address you want to change, then click Edit to change it. o Remove: Select the address you want to delete, then click Remove. The email addresses that pop up and I want to remove/edit are miss spelt versions of my email addresses.

I'm not sure how that's related to the bogus notifications from your question, sorry. Hope the steps from the help article linked worked for you.

Please forgive me, I am new to this and I think I have confused the issue.It seems I have used the wrong terminology in trying to explain my problem.It probably is not a Firefox issue.This box I mentioned appears when I start entering my email address as the address to send an email .I use the Mail app via BT Broadband with Firefox as my browser.Two of the addresses shown (which are mine )are miss spelt.The result is if I click on them to autofill they will not be sent and I then get a message from BT saying so.

Ah so that's some content autofill prompt — can you share a screenshot to help understand if this comes from Firefox, or is a feature of your mail service? (It's possible the mail application you use is autofilling contacts from previous use, so you'd have to check with them how to remove misspelled recipients.)

For BT forums, see e.g. community.bt.com/t5/General-email-queries/Autocomplete/td-p/2402637

Have uploaded and image