Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

Make sure you are not blocking content.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

One issue that seems more common lately is Firefox's Tracking Protection feature. When it is blocking content in a page, a shield icon will appear at the left end of the address bar next to the padlock icon. This article has more info on managing this feature: Tracking Protection {web link}

When trying to play the games in safe mode they didn't do anything once logged in

Did you check the Tracking Protection part on the bottom?

I've tried everything I can think of. I can play the games on other browsers with no problem. Below is one of the games I can't play.

Thanks

I called for more help.

Bnice2me said

From Adobe, Feb 12th, 2019...

New Flash Update (32.0.0.142): https://get.adobe.com/flashplayer

Announcements:
Mac NPAPI Sandbox - Mozilla Firefox
The Mac NPAPI Flash sandbox is enabled by default on Firefox 62 and later.

Disabling the sandbox requires using about:config to set...

dom.ipc.plugins.sandbox-level.flash to 0

...and then restarting the browser. The sandbox is known to prevent the following features from working:

• Print to PDF from the Flash print dialog
• Print to “Open in Preview” from the Flash print dialog
• Quicklook in the File->Open dialog
• Saving files to the filesystem from a Flash applet
• Flash applets downloading and running the Adobe Air installer
• Flash triggering Adobe Air applications to run
  
  

~Pj

FireFox Version 65.0.1, first offered to
Release channel users on February 12, 2019.

Fixed:

Fixed accidental requests to addons.mozilla.org when an addon recommendation doorhanger is shown. (bug 1526387)

Improved playback of interactive Netflix videos. (bug 1524500)

Fixed incorrect sizing of the "Clear Recent History" window in some situations. (bug 1523696)

Fixed audio & video delays while making WebRTC calls. (bug 1521577 & bug 1523817)

Fixed video sizing problems during some WebRTC calls. (bug 1520200)

Fixed looping CONNECT requests when using WebSockets over HTTP/2 from behind a proxy server. (bug 1523427)

Various stability and Security Fixes.

~Pj