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.

XML Parsing Error: undefined entity Location: chrome://browser/content/browser.xhtml Line Number 760, Column 13: <toolbarbutton id="UITourTooltipClose" class="close-icon" ------------^

  • 1 reply
  • 1 has this problem
  • 841 views
  • Last reply by cor-el

emt426
emt426
more options

When I click on a link in Thunderbird to open in Firefox, I get the following error.

XML Parsing Error: undefined entity Location: chrome://browser/content/browser.xhtml Line Number 760, Column 13: 

           <toolbarbutton id="UITourTooltipClose" class="close-icon"
</pre>

^

I am unable to resolve the issue. Is there a fix for this error?

Thanks in advance.

Bill
When I click on a link in Thunderbird to open in Firefox, I get the following error. XML Parsing Error: undefined entity Location: chrome://browser/content/browser.xhtml Line Number 760, Column 13: <toolbarbutton id="UITourTooltipClose" class="close-icon" ------------^ I am unable to resolve the issue. Is there a fix for this error? Thanks in advance. Bill

Chosen solution

This can be caused by a failed Firefox update that left you with a mixture of old and updated files in the Firefox program folder. This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files. You need to do a clean reinstall and remove the Firefox program folder to ensure that all files are replaced. You may have to disable security software temporarily in case the problem persists.

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

Read this answer in context 👍 0

All Replies (1)

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

Chosen Solution

This can be caused by a failed Firefox update that left you with a mixture of old and updated files in the Firefox program folder. This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files. You need to do a clean reinstall and remove the Firefox program folder to ensure that all files are replaced. You may have to disable security software temporarily in case the problem persists.

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.