Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, 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
This thread was archived. Please ask a new question if you need help.
Solved Archived

How do you set an external HTML source viewer?

Firefox Settings
cor-el replied
RobStow
RobStow

I want to stop use of FireFox's built in HTML source viewer and use an external viewer. Tools|Options provides no way to do this. Poking around in about:config doesn't reveal anything either.

Surely this question has been asked and answered a million times already, but when I try to search for it on the Mozilla support web page I get millions of garbage hits about PDF files - and I can't find a way to get to an advanced search that excludes the term "PDF". Even the obvious guess of putting "-pdf" in the search field doesn't work. Even more mind boggling: searching for "advanced search mozilla support" turns up only garbage - nothing about how to do an advanced search.

I want to stop use of FireFox's built in HTML source viewer and use an external viewer. Tools|Options provides no way to do this. Poking around in about:config doesn't reveal anything either. Surely this question has been asked and answered a million times already, but when I try to search for it on the Mozilla support web page I get millions of garbage hits about PDF files - and I can't find a way to get to an advanced search that excludes the term "PDF". Even the obvious guess of putting "-pdf" in the search field doesn't work. Even more mind boggling: searching for "advanced search mozilla support" turns up only garbage - nothing about how to do an advanced search.

All Replies (1)

cor-el
cor-el
  • Top 25 Contributor
  • Moderator

Chosen Solution

You can look at these prefs to use an external viewer.