(Using KDE Plasma on X11) I’ve having this problem for quite a while, the pictures that were dragged and dropped onto my Craigslist post become solid color. When viewed via Gwenview, the title bar of the filename the picture was affixed with “-42%” at the end. It happened a lot when I tried to upload picture to this site as well. Browser is Librewolf installed via AUR, but it also happened on Chrome via Flatpak and Brave via AUR.
You forgot to mention what browser…
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Thank you for flagging, I just added it onto the post.
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Yeah that’s what i though 
See LibreWolf is hardened a lot, so you need to loosen it.
Some sites use canvas, once you on that page you should see some icon in url bar that would ask you if you want to enable canvas - enable it (might require site refresh to work) and such images will be shown, but you’ll loose some privacy on that site coz canvas can leak stuff.
That image icon has Canvas option
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No you don’t. 
I agree, you should harden it even further!
But not so much so that you stand out. It’s best to do nothing to it, except containerise all the websites. Maybe block cross-site javascript.
That i’m afraid is not possible…
Besides such model works only for Tor, LibreWolf doesn’t use “everyone looks the same” model.
Actually, it does. It uses the same RFP settings the Tor browser uses.
It spoofs your client as Firefox on windows. It spoofs your timezone and it uses light theme by default (absolutely disgusting), it keeps the window size fixed (letterboxing). Also, it suppresses keybindings using the Alt key.
See here: https://librewolf.net/docs/faq/
Yes it does a lot of things like Tor, i know it, but as someone who follows it’s development and process closely - it absolutely doesn’t use such model, LibreWolf will still stand out between each other.
In fact the only browser that use “everyone looks the same model” is Tor, it’s unique in that sense.
What’s the point of LibreWolf’s RFP settings then?
Hardening for security / privacy compared to stock Firefox, nothing more nothing less.
It significantly reduces tracking surface of your specific instance of browser.
And you agree that having a bunch of extensions installed increases your tracking surface?
Goes without saying, but it won’t really hurt on LibreWolf because i can assure you ad agencies and feds will still detect that you specifically use LibreWolf - it’s far from being bulletproof, unlike Tor - where any change to settings / plugins just utterly ruin your anonymity and makes you glow like 
.
It’s just very different threat models, LibreWolf doesn’t claim to be anonymous, it’s just much better configured defaults browser for average user, but it’s still a casual browser.
So I was right.
Yes and no.
- It’s best to do nothing - probably, less changes and less additional code from plugins - better.
- It won’t really matter in the end, because you would be identified anyway - certainly.
Of course it matters. Why would you bother with LibreWolf if it didn’t matter? May as well use Edge if it doesn’t matter. 
And yes, LibreWolf is not Tor, it doesn’t give you anonymity. I never claimed that it does.
That’s deadly sin!
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