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small white spots

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Anthony Knights25/08/2021 10:01:28
562 forum posts
234 photos

Is there any reason for the small white squares and dashes in the green headers on some of the posts. Some flash on and off and others are there all the time. Has any one else noticed this or is it just me?

I am using Firefox on a Linux Ubuntu machine.

JasonB25/08/2021 10:02:58
21431 forum posts
2448 photos
1 articles

Not seen them myself W10 & Chrome

Can you post a link or name a thread with the issue or post a screen shot

Any add blockers being used?


Edited By JasonB on 25/08/2021 10:09:06

Journeyman25/08/2021 10:05:16
1033 forum posts
199 photos

Nothing apparent using Firefox 91.0.1 on Linux Mint.


Michael Gilligan25/08/2021 10:35:21
18921 forum posts
941 photos

All looks clean on my iPad


Nicholas Farr25/08/2021 10:46:28
2984 forum posts
1352 photos

Hi, I've not seen any, W10 - MS Edge.

Regards Nick.

Anthony Knights25/08/2021 17:15:52
562 forum posts
234 photos

Must be me. I've got everything set to "strict" security settings. I have just taken a screen shot and they are not visible on that, although they are still there when I view normally.

Michael Gilligan25/08/2021 17:24:23
18921 forum posts
941 photos

Just for the sake of curiosity … Could you take a photograph of your screen, so that we know what we’re missing.


Frances IoM25/08/2021 17:27:04
1157 forum posts
28 photos
probably the farcebook tracker as for non-javascript a 1pixel invisible element is loaded - javascrpt enabled get to load a special bit of code thus probably it is a 1 pixel non visible image that would be probably be blocked by Firefox on its anti tracking settings.

Quite why this tracker is on the site is not clear other that the site owners get paid for reducing users' privacy.

Edited By Frances IoM on 25/08/2021 17:27:40

Anthony Knights25/08/2021 17:53:41
562 forum posts
234 photos

Hi Michael. Why didn't I think of that. Anyway here it is. Apologies for photo quality.spots.jpg

Anthony Knights25/08/2021 18:27:03
562 forum posts
234 photos

As an experiment, I tried switching the enhanced tracking protection OFF for this site and it did not appear to make any difference. It's back on now.

Michael Gilligan25/08/2021 18:43:01
18921 forum posts
941 photos

Thanks, Anthony

… No, I’ve never seen that


Peter Cook 625/08/2021 19:12:45
164 forum posts
50 photos

Do they scroll with the bars, or stay put in the same place on the screen? If the latter you may have interference on the video cable, or possibly a display going bad. You would probably not notice them on a white background.

The screenshot would grab the pixels that are supposed to be there, rather than what you are actually seeing - hence the fact that they no-show on the screenshot.

If you can arrange a completely black image in a window (something like Paint should allow you to create one) then move it around the screen - that should show up any bad pixels.

Edited By Peter Cook 6 on 25/08/2021 19:14:59

old mart25/08/2021 20:51:16
3337 forum posts
208 photos

You can try running a colour screen test program to see if there is any problem with your pixels.

Anthony Knights26/08/2021 08:04:07
562 forum posts
234 photos

Hi all. The white pixels actually scroll with the green bars so it's not a faulty screen. I will have to boot the windows 10 partition and see what happens with that.

Anthony Knights26/08/2021 08:35:02
562 forum posts
234 photos

Writing this from windows 10 using firefox on the same computer and there is no sign of the white pixels. Possibly need to re install ubuntu?

From a puzzled Anthony

Michael Gilligan26/08/2021 08:50:35
18921 forum posts
941 photos
Posted by Frances IoM on 25/08/2021 17:27:04:
probably the farcebook tracker as for non-javascript a 1pixel invisible element is loaded - javascrpt enabled get to load a special bit of code […]


Having only a very slight understanding of these things, I looked for a simple summary and found this: **LINK**


SillyOldDuffer26/08/2021 09:17:09
7544 forum posts
1679 photos
Posted by Anthony Knights on 26/08/2021 08:35:02:

Writing this from windows 10 using firefox on the same computer and there is no sign of the white pixels. Possibly need to re install ubuntu?

From a puzzled Anthony

I'm using Firefox on Ubuntu 18.04, and 21.04 without white spots.

Before reinstalling the whole of Ubuntu I'd remove and reinstall Firefox: could be Firefox is corrupt.

Hold down Ctrl, Alt and hit 'T' to get a terminal.

In the terminal, at the $ prompt, type:

sudo apt-get remove firefox

Hit return, enter password, and a stream of removal messages should be displayed. When finished, type:

sudo apt-get update

This makes sure your computer is synchronised with Ubuntu's internet software repositories. Then, type:

sudo apt-get install firefox

Although rebooting isn't necessary, it does clear everything out, so worth doing whenever corruption is suspected. Cross fingers. restart the system. then and test the Green Banners.

Postscript: there is a more nuclear version of the remove command. remove doesn't delete user configuration settings, cookies etc. If you don't care about them, replace:

sudo apt-get remove firefox


sudo apt-get purge firefox

Good luck


Anthony Knights26/08/2021 11:25:02
562 forum posts
234 photos

Hi there Dave. Just tried removing and then re installing Firefox as per your instructions, but the little swines are till there. I am still learning about Linux command line and actually have the terminal icon in my favourites list. Are you or anyone else able to recommend a suitable book to learn more from.

Thanks Anthony

Russell Eberhardt26/08/2021 11:33:35
2703 forum posts
86 photos

My go to reference is:

"Linux Command Line and Shell Scripting Bible", by Blum.


Anthony Knights27/08/2021 09:33:36
562 forum posts
234 photos

Thanks Russell


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