Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Etsi tuesta

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Ketju on arkistoitu. Esitä kysymys, jos tarvitset apua.

Can't install any add-ons - "You need to download Firefox to install this add-on.". Firefox is latest version.

  • 2 vastausta
  • 17 henkilöllä on sama ongelma
  • 4 näyttöä
  • Viimeisin kirjoittaja Bluegreen0

Bluegreen0
Bluegreen0
more options

After upgrading to Quantum, I'm unable to install any add-ons from https://addons.mozilla.org.

I've made sure I'm using the latest version of Firefox.

When I find an add-on I want to install (having checked it's compatible with Quantum), the 'Add To Firefox' button is always disabled and below is a red banner saying: "You need to download Firefox to install this add-on."

Does anyone have any suggestions?

Edit - I've also made sure there are no active add-ons.

Thanks

After upgrading to Quantum, I'm unable to install any add-ons from https://addons.mozilla.org. I've made sure I'm using the latest version of Firefox. When I find an add-on I want to install (having checked it's compatible with Quantum), the 'Add To Firefox' button is always disabled and below is a red banner saying: "You need to download Firefox to install this add-on." Does anyone have any suggestions? Edit - I've also made sure there are no active add-ons. Thanks

Muokattu , muokkaaja Bluegreen0

Valittu ratkaisu

hello, please see if this helps: How to reset the default user agent on Firefox

Lue tämä vastaus kontekstissaan 👍 5

Kaikki vastaukset (2)

philipp
philipp
  • Moderator
more options

Valittu ratkaisu

hello, please see if this helps: How to reset the default user agent on Firefox

Bluegreen0
Bluegreen0 Kysymyksen kysyjä
more options

Thanks philipp, that worked. Appreciate your help (and the quick response).

As an aside, even when the button was disabled, I found I was able to download the add-on xpi manually.

Right-click the disabled "Add To Firefox" button, and select "Save Link As". Then drag and drop the downloaded xpi file on to Firefox to install it.