[Bug 779364] Re: Missing words (single and blocks) in firefox

Bug Watch Updater 779364 at bugs.launchpad.net
Tue Apr 28 20:06:55 UTC 2020

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On 2011-05-08T19:19:21+00:00 lnxusr wrote:

User-Agent:       Mozilla/5.0 (X11; Linux i686; rv:2.0.1) Gecko/20100101 Firefox/4.0.1
Build Identifier: Mozilla/5.0 (X11; Linux i686; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

I've noticed individual words as well as entire blocks of text missing
in pages.  At first I thought it was poor editing, then after quite a
few instances decided it was not.  If I cut and paste the problem area
into a text editor, the missing text is relieved.  A Google search shows
a similar problem a few years ago in the 3.x branch, but in that problem
it appears that highlighting the text on the page would make it appear.
Now, it does not, although it is clearly there as cut and paste captures

The missing word thing happens quite often on a lot of sites including
google searches, slashdot, reddit and techdirt, among others, although I
don't recall missing whole blocks other than on techdirt.

Reproducible: Always

Steps to Reproduce:
1. load web page

Actual Results:  
Notice seemingly random words missing throughout the page.

Expected Results:  
All text visible.

I've also noticed that reloading the page, visiting it later or, in the
case of a Google search, typing in the same search phrase will result in
the same word or block missing.  The word is replaced with a blank space

I've also reported this on the ubuntu buglist as Bug 779364.

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On 2011-05-08T20:53:26+00:00 Mozilla-k wrote:

Works for me.
Mozilla/5.0 (X11; Linux x86_64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

Does the issue still occur if you start Firefox in Safe Mode?

How about with a new, empty profile?

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On 2011-05-08T20:54:49+00:00 Mozilla-k wrote:

Adding link to the Ubuntu bug:

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On 2011-05-09T08:07:30+00:00 lnxusr wrote:

(In reply to comment #1)
> Works for me.
> Mozilla/5.0 (X11; Linux x86_64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1
> Does the issue still occur if you start Firefox in Safe Mode?
> https://support.mozilla.com/en-US/kb/Safe+Mode

Yes, text is still missing in Safe Mode.

> How about with a new, empty profile?
> https://support.mozilla.com/en-US/kb/Basic+Troubleshooting#w_8-make-a-new-
> profile

This got rid of the problem.  After copying over all the important files
from the old profile, everything still worked.  Setting up my new
profile to my liking also reveled the problem.  Unchecking the 'Allow
pages to choose their own fonts,...' checkbox in the Advanced Fonts &
Colors settings seems to be what is hiding the text.

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On 2011-05-09T14:24:36+00:00 Jfkthame wrote:

Please provide a screenshot showing the display problem that you're
experiencing. Also, giving an example of a static page where you see the
problem - rather than a news/blog/search-results page that's likely to
have changed by the time a developer tries to look into it - would be
helpful. Thanks.

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On 2011-05-09T15:01:23+00:00 Mozilla-k wrote:

Reporter, if you visit a page with missing words and use Ctrl + scroll
wheel to zoom, does that change which words are missing?

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On 2011-05-10T13:52:12+00:00 lnxusr wrote:

(In reply to comment #5)
> Reporter, if you visit a page with missing words and use Ctrl + scroll wheel
> to zoom, does that change which words are missing?

No, zooming in and out does nothing.

Further investigation has me to believe the problem is in the font
rendering.  As I stated above, not allowing the page to use its own font
makes the text hidden.  It seems to be related to italicized text via
either '<i>' or '<em>' tags.  Going through sans and serif fonts in the
settings, DejaVu (both sans and serif) seems to be the kulprit (is
DejaVu the default used by Firefox when serif is selected at the top of
the font dropdown?), as any other font (ie freesans or freeserif) does
not hide the text. Whether this is the fault of the font or the way
Firefox handles it is way beyond my skills.

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On 2011-05-13T18:34:08+00:00 Deletesoftware+moz wrote:

(In reply to comment #6)
> (is DejaVu the default used by Firefox when serif is selected at the top of the font dropdown?)

I think the font is selected by the OS / X.Org / desktop environment.
Then I guess it is what fc-match from fontconfig shows. For me, it shows

$ fc-match sans-serif
DejaVuSans.ttf: "DejaVu Sans" "Book"
$ fc-match serif
DejaVuSerif.ttf: "DejaVu Serif" "Book"

and I usually have no problems where I wouldn't notice quickly that some
lines of text are overlapping (not sure I've ever seen it happen to
individual words or depending on styling). WFM with 4.0.1 for Linux

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On 2011-06-21T08:07:34+00:00 George-carstoiu-g wrote:

Mozilla/5.0 (X11; Linux i686; rv:7.0a1) Gecko/20110620 Firefox/7.0a1

WFM also. Considering all the comments, setting the status to Resolved

Reporter feel free to reopen if you disagree with my decision.


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On 2011-06-21T10:45:40+00:00 Acelists wrote:

Reporter, can you check if those problematic font files (like Dejavu) are accessible to you (have proper permissions to be read by your user)?
See bug 656882 for help how to check it. That bug may be the cause of the problem you are seeing.

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On 2011-06-21T14:44:35+00:00 lnxusr wrote:

aceman: Yes all files in the font tree are accessible to me, including
the DejaVu files.

I'm now using FF 5.0 beta 7, and the problem doesn't seem to be present.
I've been using the betas since b2, but didn't think to check
previously. I don't know when it stopped being a problem.

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On 2020-04-28T17:18:22+00:00 Harrisbritt6904-0 wrote:

This also prevents employers from being confronted with problems of a new type as a consequence of the lower participation of the State in the economy and the intensification of competition, such as the wild dispute to win contracts with the promise of low costs by sacrificing workers' wages or reducing money in the budget allocated for factory safety.  
4. It is important to create legal mechanisms that protect, sanction and repair any type of action that, in the development of the 

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