Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Avatar for Username

Search Support

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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

Firefox Android Won’t Open .XPI – Help

Lauren Bell
Lauren Bell

Adding the Reverb Calculator Extension to Firefox for Android on my Samsung Pad. I’ve downloaded the `.xpi` file, but when I try to open it, I get the message: "No app found to open xpi files." Has anyone dealt with this before or knows the correct way to install .xpi extensions on Firefox for Android? I’d appreciate any help! You can check out the tool here: https://reverbcalculator.net(https://reverbcalculator.net)

Adding the Reverb Calculator Extension to Firefox for Android on my Samsung Pad. I’ve downloaded the `.xpi` file, but when I try to open it, I get the message: "No app found to open xpi files." Has anyone dealt with this before or knows the correct way to install .xpi extensions on Firefox for Android? I’d appreciate any help! You can check out the tool here: [https://reverbcalculator.net](https://reverbcalculator.net)

All Replies (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor

If the extension is hosted on the Mozilla Add-ons site, you can go through

menu > Extensions > scroll to bottom > Find more extensions

If it's not hosted on that site, hmm, maybe the server you are downloading from is not sending a proper Content-Type header to trigger installation.