Why can't Firefox run local .swf files?

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by

maki57

Last Updated June 29, 2017 20:02 PM

My goal is trying to run .swf files through Firefox and NOT a standalone player.

When trying to run local .swf files on Firefox 29.0 (currently on 14.04), the browser opens the Open With/Save File prompt window even if the browser has the Flash plugin installed. Right-clicking on the file and clicking Open With... > Firefox just makes the browser open a new tab and then the prompt to Open With/Save File again. Selecting Firefox through that prompt window will still just make Firefox open the prompt again on a new tab.

When accessing .swf files online, though, they run normally and Firefox even shows the Lego-looking plugin indicator in the address bar saying that "Adobe Flash" is enabled for the address I'm accessing the .swf from.

In Firefox's preferences' Applications tab, SWF Files are currently set to "Use Shockwave Flash (in Firefox)", so I don't get why it won't do what it says for the case of...

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I have a question concerning local .sfw files. I followed the instructions given earlier in this thread to allow local files:

jscher2000 said

There is a new security setting in Firefox 55 that supersedes everything else. Only SWF files retrieved on http:// or https:// addresses are played (not file://, ftp://, etc.). If you want to revert to the previous behavior: (1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful. (2) In the search box above the list, type or paste plug*ht and pause while the list is filtered (3) Double-click the plugins.http_https_only preference to switch the value from true to false

Now, after completing the procedure to allow local .swf files, I am having another issue, one I have read about on other threads, but it seems it seems to be less easily understood:

When I try to open .swf files from my local file browser, instead of opening and playing these files,...

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After some digging into this myself, I've discovered it is a MIME type issue. Firefox (or Chrome) on Linux won't play SWF files if it thinks the type is application/vnd.adobe.flash.movie.

Per https://askubuntu.com/questions/478169/why-cant-firefox-run-local-swf-files:

Edit /usr/share/mime/packages/freedesktop.org.xml as root and replace the following:

With:

And then run:

update-mime-database /usr/share/mime

I found I needed to restart Firefox after. Here's a script very close to one from http://ubuntuforums.org/showthread.php?t=2218732&page=2 that performs these steps (run it with sudo), but I will warn you -- I noticed that different installs seem to have different spacing, which can trip up the sed script, which is what happened to me.

#!/bin/bash clear echo "Update file freedesktop.org.xml..."; sed -e "s///g" /usr/share/mime/packages/freedesktop.org.xml > /usr/share/mime/packages/freedesktop.org.xml.new mv...
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I am using OpenSuse 13.2, Gnome 3.14.1. My browser is Firefox 43.0.3. I'm brand new to Linux. I have an Adobe Shockwave video (.SWF) stored locally and am trying to play it in Firefox. If I double click the file, the Firefox browser opens the Open With/Save File prompt window. If I choose Open With... > Firefox this just makes the browser open a new tab and then prompt to Open With/Save File again. Selecting Firefox through that prompt window will still just make Firefox open the prompt again on a new tab. The cycle repeats, opening an infinite number of tabs, never playing the video.

I went to this site to test my Shockwave player, but it said Plugin Is Needed To Display This Content.

https://www.adobe.com/shockwave/welcome/

From that site, I suspect I need to install Shockwave, but don't know how. Any help would be greatly appreciated!

Thanks,
M...

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My goal is trying to run .swf files through Firefox and NOT a standalone player.

When trying to run local .swf files on Firefox 29.0 (currently on 14.04), the browser opens the Open With/Save File prompt window even if the browser has the Flash plugin installed. Right-clicking on the file and clicking Open With... > Firefox just makes the browser open a new tab and then the prompt to Open With/Save File again. Selecting Firefox through that prompt window will still just make Firefox open the prompt again on a new tab.

When accessing .swf files online, though, they run normally and Firefox even shows the Lego-looking plugin indicator in the address bar saying that "Adobe Flash" is enabled for the address I'm accessing the .swf from.

In Firefox's preferences' Applications tab, SWF Files are currently set to "Use Shockwave Flash (in Firefox)", so I don't get why it won't do what it says for the case of local files.

UPDATE: Apparently, Firefox has separate...

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Posted in WikinutGuidesWebBrowsers

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If you are running Adobe Flash 11.3.300.x or higher and use Firefox as your web browser, you may experience an annoying behavior as of late that is removing focus from the web browser when you relaunch Flash contents. This has been tested under 32-bit and 64-bit versions of Windows 7 and may affect other versions of the operating system as well. To reproduce the steps, you would visit a website that is displaying Flash contents. When you do, you will notice that three new processes are displayed in the Windows Task Manager (Ctrl-Shift-Esc): plugin-container.exe from the Firefox browser which is used to separate plugins from the core browser, and two FlashPlayerPlugin_11_3_300_xxx.exe processes.

When you now close the page with Flash contents and wait 180 seconds, you will notice that the three plugins get killed automatically in the browser. Visiting any page afterwards that is making use of Flash will remove the focus from the Firefox web browser so that you need to click...

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On Windows, using getURL() or a similar approach to open an HTML page from a SWF running in the standalone Flash Player (such as a Flash projector file running on a CD-ROM) doesn’t work if the user has Firefox set as their default browser. Here we’ll take a look at what’s causing the problem and how to work around it.

Note: based on some helpful feedback the code was revised on Oct. 30, 2006 to be more cross-platform-friendly.

As a followup to a question about opening local and remote resources in ActionScript, I was asked why a SWF which had been made into a projector (a standalone executable file) wasn’t able to open an HTML page using getURL() when the user’s default browser is Firefox. One initial idea was that it might be related to the security restrictions added in Flash Player 8, which (by default) make it so a SWF which is running off a user’s local computer can only access local resources or network resources, but not both. However, as the documentation...

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