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Flash is broken on firefox - only partial loads videos/animations

  • 6 replies
  • 2 have this problem
  • 28 views
  • Last reply by Oxylatium

kop48
kop48

Flash is not working on my machine ever since it upgraded to v20. The primary symptoms that are demonstrated are as follows:

  • Twitch only loads the video controls, but not the video itself
  • Speedtest's Flash app gets stuck at 100% Loading, but never actually loads
  • The Flash test page only renders a single brown shape

It seems to be that something is wrong with animation.

I have tried both Safe mode, and Refreshing Firefox. Flash works fine in Edge on the above three sites.

Flash is not working on my machine ever since it upgraded to v20. The primary symptoms that are demonstrated are as follows: * Twitch only loads the video controls, but not the video itself * Speedtest's Flash app gets stuck at 100% Loading, but never actually loads * The Flash test page only renders a single brown shape It seems to be that something is wrong with animation. I have tried both Safe mode, and Refreshing Firefox. Flash works fine in Edge on the above three sites.
Attached screenshots

All Replies (6)

Oxylatium
Oxylatium

Does it work with a fresh profile? https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

cor-el
cor-el
  • Moderator

Try to enable third-party cookies as a test.

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You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.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

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove the Cookies" from websites that cause problems.

  • Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

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

  • Switch to the DEFAULT theme: "3-bar" menu button/Tools > Add-ons > Appearance
  • Do NOT click the "Refresh Firefox" button on the Safe Mode start window
kop48
kop48 Question owner

So, it doesn't work on a fresh profile. Additionally, it's completely broken on different machine, also running Windows 10. As I stated above, I have also tried safe mode (though it doesn't help with Flash issues, as it needs the plugin). I've also tried refreshing my profile.

I do not believe it's a cookie issue, as the Flash app loads and appears to render the first frame, but then does not seem to progress any further into the animation.

What else can I provide to help with this?

cor-el
cor-el
  • Moderator

You can check the log in the Web Console for error messages and the Network Monitor (Firefox/Tools > Web Developer) to see if content fails to load or is possibly blocked.

You can also try the Live Http Headers extension.

Use Ctrl+F5 or Ctrl+Shift+R to reload the page and bypass the cache to generate a fresh log.

kop48
kop48 Question owner

Nothing useful in the log: Loading mixed (insecure) display content "http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" on a secure page[Learn More] flash-player.html GET http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif [Mixed Content] [HTTP/1.1 200 OK 7ms] This site makes use of a SHA-1 Certificate; it's recommended you use certificates with signature algorithms that use hash functions stronger than SHA-1.[Learn More] sstats.adobe.com

The SWF is loading fine according to Network Monitor (see image)

Oxylatium
Oxylatium

You can try to disable HWA and protected mode in Flash: https://forums.adobe.com/thread/891337 & https://support.mozilla.org/en-US/kb/adobe-flash-protected-mode-firefox

(restart FF in both cases)