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

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Learn More

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

Problem install/update add-ons. https://addons.mozilla.org/firefox/downloads/latest/7560/addon-7560-latest.xpi?src=api p.g.a.: Ogiltig filhash (möjligen en skadad filhämtning) -261

  • 3 antwurd
  • 23 hawwe dit probleem
  • 13 werjeftes
  • Lêste antwurd fan cor-el

Henrikeriksson
Henrikeriksson
more options

Problem install/update add-ons. https://addons.mozilla.org/firefox/downloads/latest/7560/addon-7560-latest.xpi?src=api p.g.a.: Ogiltig filhash (möjligen en skadad filhämtning) -261

Problem install/update add-ons. https://addons.mozilla.org/firefox/downloads/latest/7560/addon-7560-latest.xpi?src=api p.g.a.: Ogiltig filhash (möjligen en skadad filhämtning) -261

Alle antwurden (3)

the-edmeister
the-edmeister
  • Moderator
more options

If Firefox gave you the following error message: Firefox could not install the file at https://addons.mozilla.org/******.xpi because:
Invalid file hash (possible download corruption) -261

This error message may be caused when Firefox is set disallow third party cookies. To accept the third party cookies: go to Tools -> Options -> Privacy -> tick 'Accept third party cookies'.

Henrikeriksson
Henrikeriksson Fraacheigener
more options

Thanks for answer. I am running Firefox on Mac (apple). How do I accept cookies from "third party" in Firefox for Mac?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Menu differences: Windows: Tools > Options - Mac: Firefox > Preferences - Linux: Edit > Preferences

See Unable to install add-ons (extensions or themes)
You need to enable third-party cookies temporarily.