1178325 - firefox fails to render the content part of w3schools.com

Status: RESOLVED INCOMPLETE

(Core :: Layout, defect)

Description

[felix-mozilla]

Attachment: w3schools.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:39.0) Gecko/20100101 Firefox/39.0
Build ID: 20150626105117

Steps to reproduce:

I'm using the current testing version of firefox (39.0b7), which I compiled myself.
Linux 4.1.0, gcc 5.1, glibc 2.21, freetype 2.6, harfbuzz 0.9.41, fontconfig 2.11.1, all compiled myself.
Then I go to, for example, http://www.w3schools.com/html/html_entities.asp (or basically any content carrying page on w3schools.com).


Actual results:

See attached picture. I get the menu bar on the top of the page, I get the navigation bar on theleft of the page, and when I do view source or browser the html tree in the inspector, I can clearly see that the html is there, I just don't get it rendered.


Expected results:

I would love to see the actual contents of that web page.

Also note that while I file this bug, firefox is eating 100% CPU in top (at least it's only one of my cores).

My working theory is that it has something to do with my installed fonts, because I have seen Firefox previously display a web page as blank because I had installed a corrupt font file. fontconfig told Firefox to load that font, freetype failed to open it, and then Firefox just went "aw shucks" and rendered no text.

However in this case I attempted to deinstall the Lato fonts, and it did not help. And I can open a document in abiword and use the Lato fonts in it.

Since the font is called Lato and not Lato Regular, I assumed that may be the problem and installed a patter rewrite rule from Lato Regular to Lato in my .fonts.conf. No change. When I try fc-match "Lato Regular", fc-match sends me to Lato-Medium.ttf, which works fine in abiword.

Comment 1

[Justin [:JW_SoftvisionQA]]

Hello Felix,

Are you still encountering this bug on Firefox 42.0 or Nightly 45.0a1?

I can not reproduce this on my Linux x86_64 machine.

Thank you,

Justin

Comment 2

[Justin [:JW_SoftvisionQA]]

I will close this issue due to lack of response from the reporter.