What do you see on line 555 ?
Because here it is blank.
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Its ‘minimized’ of a bunch of things … but why do you find it suspicious or the source of your ‘fbc’ apparition?
Theres nothing in there related.
(there are ‘buttons’ for sharing quotes or copying … normal discourse stuff)
You could even block or live-edit that section if you need and dont want to read it.
I still think this is a problem with your configuration, software, browser, network, etc …
and I will probably keep thinking that until someone can point to an actual line or example of the code doing ‘~facebook stuff~’
As already stated:
So:
- Download your Facebook Data
- Delete your:
- Facebook account
- WhatsApp account
- Uninstall all Facebook / WhatsApp plug-ins, applications / snaps, flatpacks from all your devices
- Disallow all cookies in Firefox
- Delete all cookies in Firefox
- Install the NoScript plug-in and disallow all scripts everywhere.
- Install the
AdBlock+ plug-in and disallow even unobtrusive ads in its settingsuBlock Origin plugin - Allow:
- Session cookies only for sites you actually need. (Like this one)
- Permanent cookies for any equipment on your LAN (Like your router / phone / …)
- Scripts to be run permanently for sites you use daily. Any other sites (weekly / monthly) only allow scripts temporaryly.
There! Now you’re running the way I’m running and your browser speed will increase by 50-100% and you won’t get any ads anywhere including YouTube, Google, …
If something doesn’t work, it’s not worth having (E.G. pinterest)
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Well, it could be my network or my plugin as I have this on two computers with different OS and different FF versions.
How can I post the tremendously large line I found on the page code (can Firefox give a wrong page code ?)
@Fabby : you’re very kind, but…
- On my Manjaro’s Firefox, I clean history, cache, cookies several times a day and… didn’t open any Facebook session for days.
- On my Debian, I never opened FB or Whatsapp…
- The line I would like to post was seen on Manjaro’s forum code on a separate Firefox instance WITHOUT any plugin.
- Don’t ever suggest Adblock+ that is a bloatware, but uBlock origin.
- I happen to make Firefox speed & security tutorials for several years and sometimes contribute to PrivacyTools.
Now, how can I post this file ?
ublock origin is heaps better
(reasons: abp is corporate, has ‘acceptable ads’, isnt as competent about blocking, and costs multiple times the overhead)
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It’s just habit: ABP was first, so I still use that, but UBO seems to use a totally different algorithm so I’m going to disable ABP and give UBO a try.
but in the meantime:
(Also edited the original in case someone else stumbles across that)
cc @cscs
Probably a bunch of ways … but I will point here:
(a number of the services also do file sharing, ex: curl -F'file=@yourfile.png' https://0x0.st)
Ha yes … back in the days when FF was the only browser with extensions.
… I also used it way back then.
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Mk … so I see
share_links\":\"twitter|facebook|email\"
and
enable_signup_cta\":true,\"facebook_app_id\"
Which seems to be just for the sign up ability …
The first one seems like it might be a ‘share to’ type of thing … but it doesnt seem available on any part of the page… so I am not sure it is blocked or if it is only active if you are currently signed in?
Well, when I saw that uBlock Origin uses much less RAM and CPU than AdBlock+, I was sold. It’s just that there were two µBlocks at the time so I stayed with what I had but:
@cscs Gracias!
@nam1962 Merci! Et va télécharger tes données FB maintenant et efface ce bordel de b***. 
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- I don’t use that plugin, i use Firefox Multi-Account Containers – Get this Extension for 🦊 Firefox (en-US) only…
- I just checked the CSP of the forum in firefox, and it looks like it does not allow any external domain to load scripts.
- I use
uMatrixand i don’t see anything related to facebook.
The above combined means: It is a bug with that FB-Container Addon.
I suggest you file a bug report at:
Hi, I just tested with Facebook container off.
Then I checked the bottom code of post pages of 3 discourse forums:
At the bottom of each of them I found a section:
<div id='offscreen-content'>
and somewhere below, a line begining with:
<div class="hidden" id="data-preloaded" data-preloaded="{"site"................
Like the one I gave the pastebin above.
I checked that on my Manjaro and I double checked on another computer whith Debian + FF-ESR (on which I NEVER opened any instance of Facebook nor WhatsApp or any other FB subisidiary - Eh oui @Fabby: JAMAIS et je l’avais déjà dit plus haut ! 
So, do you think I have a kind of spectrum dev here, whom would add code @ the bottom of my visited Discourse pages ?
Btw : the behaviour of Facebook container is absolutely logical : what it does is forbidding any FB related code to be operational.
This is useful, as, as you all know, there is FB tracking code everywhere (that can track even user with no FB account.)
My guess is that Discourse embeds social media buttons that could be activated (while, for instance, if you want a FB or Twitter button on WordPress you have to code it or to add a plugin).
Can you check if I’m alone with this line at the bottom of post pages ?
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I can see those also, but those are only for functionality of the forum.
I have not found anything wrt FB, even tried different forum themes…
I am personally very anti-ads and tracking myself, so i have blocked some domains via DNS also 
But even with that it should still show in uMatrix if they would try to contact offsite domains of FB…
I think this would be interesting to you: Facebook Container on Firefox detects tracker while reading a topic - feature - Discourse Meta
The important part of that link:
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Well, well, well…
I spent too much time on this.
Well, I have no more time to spend.
Facts:
- Forum’s CMS code has FB or twitter presets (even if not active)
- the specific code line for this is more than 250Ko (!) causing the search for page code with browser to take about 1 minute !
If anyone cares about the site’s structure and value, I suggest filing question on:
…and NOT asking me to change my add-ons for spotting this !
What you have found is a a json settings file in which it is possible to set an app id - and that setting is empty.
the " are url encoded as \"
"facebook_app_id":""
And a setting where it is possible to set a share to social link
"share_links":"twitter|facebook|email"
Well in that case, i’m sure i speak for all when i say:
The time we spend to try to help you, is more valuable as the time you spend reading our feedback.
– ©TriMoon, 2020
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