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I have some shockwave files that I use to teach Astronomy. They no longer work on Firefox 55, they do on Safari though.

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The last time I taught this class in the spring semester (ended June 2017), these files worked. These files were from Pearson dated from 2009. They use an htm file to call a swf file. These files are embedded in my PowerPoint lectures.

I have discovered that my version of Safari does play these files.

I have installed Adobe Flash player, then deinstalled it, and reinstalled it again. No help.

The last time I taught this class in the spring semester (ended June 2017), these files worked. These files were from Pearson dated from 2009. They use an htm file to call a swf file. These files are embedded in my PowerPoint lectures. I have discovered that my version of Safari does play these files. I have installed Adobe Flash player, then deinstalled it, and reinstalled it again. No help.

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Are these files retrieved from internet or are this local files retrieved via the file: protocol?

For the latter you need to toggle this pref on the about:config page.

  • plugins.http_https_only = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

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Chosen Solution

Are these files retrieved from internet or are this local files retrieved via the file: protocol?

For the latter you need to toggle this pref on the about:config page.

  • plugins.http_https_only = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

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These files are not retrieved from the internet, in that the files are on my hard drive.

I do not understand the meaning of the use of the file protocol. Obviously, I'm a neophyte. Can you explain that some more, or point me in the right direction.

I did change the about:config page and ran the PowerPoint animation successfully.

Thanks.