I agree with him 100%:

"Would be a nice extension but adding a commercial plug to my context menu is a total no-go and a reason to delete that extension at once!"

very bad, for my outlook.com address I received: We are currently unable to deliver emails to xxx@outlook.com. We received a soft "bounce message" from your email provider when we tried to forward the email to you. This can happen if Relay couldn't connect to your email provider or if your inbox is full. We'll try again on 01/17/2022 07:49.

My inbox is not full!

Would be a nice extension but adding a commercial plug to my context menu is a total no-go and a reason to delete that extension at once!

I really want to like this add-on but the first test message I tried, forwarded to my Yahoo mail account resulted in a message:
"We couldn't load this message retry". Retry yielded the same result.

impossible de répondre en retour au mail émetteur en utilisant
replies@relay.firefox.com pour exemple:

nom1.gmail.com ---> nom2(alias).mozmail.com---> nom3.free.fr
ça fonctionne mais

nom3.free.fr --->replies@relay.firefox.com---> nom1.gmail.com

ne fonctionne pas nom1.gmail.com ne reçoit rien en retour

Ok, my computer is 6 years old, still, 15%+ cpu usage, all the time? Even when I'm just letting firefox run in BG? I haven't used the extension yet, but it hampered everything else.

l'extention .mozzilla ne fontionne sur aucun site

Buen concepto e intención. Sin embargo en los sitios donde más me interesaba mantener mi privacidad, no los pude usar porque no los aceptaban. Ya tienen registrado que mozmail.com se usa para ésto y no lo aceptan. Una pena. Gracias igualmente por el intento!

The relay tool is annoying at best. It breaks frequently where an email field will hover over a pop-up blocking the ability to fill in fields. I've noticed that Firefox is breaking web pages more often - mostly payment pages. Have to go to Chrome and MS Edge to complete transactions. Hoping I don't have to stop using Firefox but as more things break websites, the more likely the case.

I used Firefox Relay for several months on my Gmail account but then I found that although I could send emails to my friends at least three of them (possibly more) were unable to reply as the message they kept receiving was that the server was not compatable.

So ---- after much serching, I finally found (by mistake) the place where I could remove Firefox Relay. It was not easy to find this!!!

Now my friends can send emails to me again.

To answer the response from the developer: They were trying to send me emails to my regular Gmail address as they always had. They were not doing anything different from what they always had in sending me emails.

I am getting a 5.7.1 TLS required by recipient ERROR when I tried to use two of the relay email addresses - what's the problem please?

There aren't any directions it doesn't indicate if I need 1 or 5 I filled all out so I guessed. Again i'm left hanging no further instructions so I guessed. I seems the whole site is probably the same. Have someone from outside the building go through it. Each time I use an alias do I loose it. I'm hanging here should I just unload it?

Can't get it to work.

It's a great idea but is doesn't work. Clicking on the icon in the email address field doesn't produce an address. Wonder if it is being block by one of my other add-ons.

It would appear that Firefox has not done their homework on the Relay addition. After I loaded it, I could NO longer enter my Google Gmail account as the email I had been using for years would not fully appear in the User field. They need to make the application user friendly by adding a simple ON and Off switch to which sites to be trusted and which sites to use Relay...DUH. What a huge let down Firefox! I'm not sure how to proceed at this point to retrieve my emails from Gmail. If you use Gmail or any other site where it automatically loads, DO NOT upload this software. You WILL have issues. I posted my issue on their site. Let's see if they will know how to fix it. Or, I will just try to find a way to delete it altogether.

Won't save labels for alias. They all revert to my email address. No way to use the custom domain I paid for either.

An extension from Mozilla for Firefox that does not work on Firefox. Sad, but unfortunately unable to use it even once, even after restart and similar trials.

It is impossible to join to Firefox Relay Premium from Ukraine - Stripe blocks payment either from card or PayPal. Ridiculous