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

This thread was archived. Please ask a new question if you need help.

Cannot install web developer because: Invalid file hash (possible download corruption) -261

  • 4 replies
  • 14 have this problem
  • 2 views
  • Last reply by cor-el

AnonymousUser
AnonymousUser
more options

I cannot access my web developer tasks anywhere. I tried to install again but got this message: because: Invalid file hash (possible download corruption) -261

I cannot access my web developer tasks anywhere. I tried to install again but got this message: because: Invalid file hash (possible download corruption) -261

All Replies (4)

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

Try to enable third-party cookies temporarily during the download and installation of the extension. --- Enhanced Tracking Protection in Firefox for desktop Third-party cookies and Firefox tracking protection

AnonymousUser
AnonymousUser Question owner
more options

Since 3.6.6 I've been having the same problem. Not just one extension but on several.

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

Save the xpi file to your desktop and install the extension by dragging the file in a Firefox tab or use File > Open File. See also http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

AnonymousUser
AnonymousUser Question owner
more options

I'd checked everything from that website without success. Things worked fine with 3.6.4. It seemed to have broken with 3.6.6. Would a re-install help??