Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

403 forbidden message when trying to go to Thunderbird support page


When selecting the Help Contents from the Thunderbird Help drop down list, Firefox will not take me to the Thunderbird Support page. The following message is displayed on the the empty tab: Forbidden

You don't have permission to access /en-US/thunderbird/20130328110546/ on this server. The tab name is 403 Forbidden. Clearing the cache did not help. I could get to the support page for Thunderbird a week ago, but the search function was not available. A message popped up that said to try again in a few minutes. Clearing the cache did not help.

Additional System Details

Installed Plug-ins

  • Picasa plugin
  • Shockwave Flash 11.6 r602
  • GEPlugin
  • iTunes Detector Plug-in
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.02
  • Google Update
  • 5.1.20125.0
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0

More Information

  • Top 10 Contributor
418 solutions 4938 answers

Disable your Firewall and antivirus and give a try.

Question owner

Disabling the firewall did not fix the problem.

  • Top 10 Contributor
418 solutions 4938 answers

which antivirus are you using?

  • Top 10 Contributor
  • Moderator
10783 solutions 97065 answers

Does this also happen if you enter that website via the main entry (i.e. remove all trailing path data from the link and only keep the domain)?

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

You can remove all data stored in Firefox from a specific domain via "Forget About This Site" in the right-click context menu of an history entry (Show All History or History sidebar) or via the about:permissions page.

Using "Forget About This Site" will remove all data stored in Firefox from that domain like bookmarks, cookies, passwords, cache, history, and exceptions, so be cautious and if you have a password or other data from that domain that you do not want to lose then make a note of those passwords and bookmarks. You can't recover from that 'forget' unless you have a backup of the affected files.

It doesn't have any lasting effect, so if you revisit such a 'forgotten' website then data from that website will be saved once again.

Question owner

cor-el, The answer to your first question is, yes. I cleared the cache and lost all Firefox tabs that were currently open. I am clicking on a link (Help Contents) within a Mozilla program (Tbird), to take me to that page in another Mozilla program (Firefox) and I get a 403 Forbidden message. I believe that the problem WAS on Mozilla's end. I say WAS, because this problem is no longer present for reasons that I cannot explain. I believe that there have been issues with Thunderbird lately. Pat