Can you clarify what you mean with disabling JavaScript?

JavaScript should be enabled unless you disable it yourself or use an extension to achieve this. JavaScript is built-in and there is no need for another engine to run JavaScript.

Some websites state that JavaScript is disabled when they are unable to start the Flash player or whatever player they prefer to use, but often this is just an incorrect guess on their part.

Do you have problems with your Flash plugin on sites that use Flash? What sites have the problem (an example or two is fine)?

Have you checked for an update to your Flash player? https://www.mozilla.org/plugincheck/ (Note: other plugins may also want to be updated, but let's just focus on "Adobe Flash" or "Shockwave Flash" for now.)

Some websites state that JavaScript is disabled when they are unable to start the Flash player or whatever player they prefer to use, but often this is just an incorrect guess on their part. Do you have problems with your Flash plugin on sites that use Flash? What sites have the problem (an example or two is fine)? Have you checked for an update to your Flash player? https://www.mozilla.org/plugincheck/ (Note: other plugins may also want to be updated, but let's just focus on "Adobe Flash" or "Shockwave Flash" for now.)

apparantly the first response was from someone who doesn't understand what i'm complaining about. I just updated the javascript plugin, it shows as the latest version but firefox claims it's unsecure and wont let me enable it, i checked teh update box on another plaugin that is also disabled. and is up to date, the javascript plugin does NOT have an update link. so i don't know what YOUR asking me. the javascript plugin to play streaming videos IS NOT BUILT IN. And i want to know WHY mozilla found it necessary to disable the latest javacript plugin without offering a link to one they will let you use.

hulu.com, dubbedanime,animeseason, when i couldn't play hulu, i checked my my addons and plugins and found that they had updated my firefox and the update disabled my version of javascript, 8.0.65 which your link shows as up to date. but it is still disabled and i can't turn it on to view videos.

Java and JavaScript are different programming languages. To avoid confusion, see:

• http://kb.mozillazine.org/JavaScript_is_not_Java

I assume that this is about the Java plugin (8.0.65/66 is current), but that plugin isn't used to play media files. For media files either the Shockwave Flash plugin is used or the HTML5 media player (YouTube defaults to the latter).

Can you attach a screenshot that show what error message you get?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Your System Details List shows multiple Flash plugins.

• Shockwave Flash 18.0 r0
• Shockwave Flash 19.0 r0

You can find the installation path of all plugins on the about:plugins page.

• http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins

You can check the Flash player installation folder for multiple Flash player plugins and remove older version(s) of the plugin (NPSWF32) and possibly (re)install the latest Flash player.

• (32 bit Windows) C:\Windows\System32\Macromed\Flash\
• (64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\

You can check for problems with current Shockwave Flash plugin versions and try this:

• make sure you have the latest Flash version:
  http://www.adobe.com/special/products/flashplayer/fp_distribution3.html
• check for updates for your graphics drive drivers
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
• disable protected mode in the Flash plugin (Windows Vista and later)
  https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox
• disable hardware acceleration in the Flash plugin
  https://helpx.adobe.com/flash-player/kb/video-playback-issues.html
• disable hardware acceleration in Firefox
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

timR said

i checked my my addons and plugins and found that they had updated my firefox and the update disabled my version of javascript, 8.0.65 which your link shows as up to date. but it is still disabled and i can't turn it on to view videos.

Most sites play videos using one of the following:

• The Shockwave Flash plugin
• The Silverlight plugin
• Firefox's built-in HTML5 video player

Some sites use the Java plugin (Java(TM) Platform SE 8 U65) for games, but not for videos.

timR said

apparantly the first response was from someone who doesn't understand what i'm complaining about. I just updated the javascript plugin, it shows as the latest version but firefox claims it's unsecure and wont let me enable it, i checked teh update box on another plaugin that is also disabled. and is up to date, the javascript plugin does NOT have an update link. so i don't know what YOUR asking me. the javascript plugin to play streaming videos IS NOT BUILT IN. And i want to know WHY mozilla found it necessary to disable the latest javacript plugin without offering a link to one they will let you use.

Actually it was you confusing the difference between JavaScript which is built in Firefox and the separate Java plugin installed on system.