Could you give a direct link to a page where you see this problem? Hopefully it's a public page that doesn't require a login.

You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• hold down the Shift key and left-click the Reload button
• press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• press "Command + Shift + R" (Mac)

Clear the cache and remove the cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Clear the cache:

• Options/Preferences -> Privacy & Security -> Cached Web Content: "Clear Now"

"Remove the cookies" from websites that cause problems.

• Options/Preferences -> Privacy & Security -> "Use custom settings for history" -> Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Thanks for helping structure the problem, which is now solved:

re jscher2000, example page with failed progressive image load is: https://www.bloomberg.com/news/articles/2018-02-06/what-on-earth-happened-to-stocks-here-s-where-to-cast-the-blame

(many images fail to load)

re cor-el proposed solutions: I was running FF57, clearing cache was no help, nor was reloading as suggested, but I was running as addons only ublock origin.

So...turning off ublock origin fixed the problem of non-loading of progressive images: immediate problem 'solved' (new problem created).

Now I'm going just rant, so all can 'hang up' with my genuine thanks: Sad how everything that used to just work in FF now requires troubleshooting, reinstall, or workaround: Java (there goes my VPN login process), Session Manager (gone!), no ublock (above image problem), etc

Mozilla should moreover consider that constantly changing the interface, appearances, and menu/button locations is totally destructive for productivity. If FF were a grocery store, I would stop shopping there---because who wants to hunt and peck for what they need when the 'store' is being remodeled every month or so.

Best, C

Hi Cronos, for issues with uBlock Origin, please post here:

https://www.reddit.com/r/uBlockOrigin/

The author is very responsive to bug reports. He would be able to tell us all whether it's a WebExtensions issue and escalate a change through the best channels. Support volunteers don't have that inside knowledge.