Enabling Adobe Flash Player

Depending on browser settings, CustomShow may be unable to run or display content correctly until the browser's Adobe Flash Player plugin is allowed and enabled.

Select your browser from the list of supported browsers below for instructions on enabling Flash Player:


Google Chrome installs and updates Flash Player automatically, therefore it is not necessary to install the plugin manually.

Flash Player may still request permission to run when accessing CustomShow, which appears as a notification at the top of the browser window when CustomShow attempts to run.


Click on Allow to grant CustomShow permission to run Flash Player within Chrome.


Viewers can also choose settings based on their preferences for any individual website by clicking on the Secure indicator to view Site Settings:


Flash settings will be displayed here, which can be configured beyond the default setting:


Additionally, Chrome allows users to specify site specific permissions for Flash. These permissions can be modified by opening the webpage chrome://settings/content.


Navigate to the Flash sub-section, and ensure Ask first before allowing sites to run Flash (recommended) is enabled.


By selecting Manage Exceptions... it is possible to enter specific webpages or domains to allow or deny access, including CustomShow (


Google provides documentation on Flash Player related issues, which can be viewed on the Google Chrome Help pages here:


Mozilla Firefox prevents Flash Player from accessing a webpage by default. When running CustomShow for the first time, you may encounter the following display with an alert to Activate Adobe Flash.


Clicking on this alert will display a notification at the top of the browser window, which prompts to allow CustomShow to run the Flash Player plugin.


Click Allow and Remember to ensure that CustomShow will run without prompting on startup.

Firefox provides more settings to specify how Flash Player accesses webpages, which can be found in the Settings panel under Add-ons.


Adobe Flash Player will display as Shockwave Flash. By default, the plugin should be set to Ask to Activate.


Clicking on the dropdown menu provides more settings to either Always Activate or Never Activate depending on the user's preferences.



Mozilla provides further documentation on managing the Flash Player plugin for Firefox, and troubleshooting issues on their Mozilla support page. This can be viewed here:


Apple Safari prevents Flash Player from running on a webpage by default, requiring users to allow access. When running CustomShow in Safari for the first time, it may be necessary to follow the steps outlined below.

Click on the Safari menu item in the top toolbar, and then select Preferences to open the Safari Preferences window.


In the window that appears, click on the Security button.


Next, click on Plug-in Settings to open the window to set permissions on various plugins, including Flash Player.


By default, the Ask option will prompt a user to Trust a webpage before granted access to Flash Player.


  • Disabling Safe Mode for

If a user wishes to do so, this check can be disabled by disabling Safe Mode for a specified page.

Please be aware that following these additional steps will override any other security options Safari uses for the page(s) selected.

Select Adobe Flash Player in the left panel, and then Hold Alt (Option) and Click on "Ask" found next to the webpage you wish to enable.


The dropdown menu will display additional options. Click on Run in Safe Mode to disable the checks on the specified webpage.


Click on Trust to enable Flash on CustomShow without additional prompts.

Microsoft Edge

Microsoft Edge installs and updates Flash Player automatically. Flash Player should be enabled by default, but you may still be prompted to allow access to the Flash Player plugin when launching CustomShow for the first time.


Select Always allow to grant CustomShow access to Flash Player when launching.

Microsoft Edge may also prompt a user to download Flash Player in some instances. This may be due to the browser disabling the Flash Player plugin, which can be re-enabled without downloading anything.


Click on the Options panel in the top-right corner of the browser window, and select Settings at the bottom of the drop-down menu.


In the new panel that appears, scroll to the bottom and select View advanced settings.


Finally, in the next panel, select the toggle button for Use Adobe Flash Player. Ensure that this option is set to On

Internet Explorer

Microsoft Internet Explorer should prompt a user to allow Flash Player to access CustomShow on startup.


This prompt should appear at the bottom of the webpage when CustomShow launches for the first time. Click on the Allow button to enable Flash to work with CustomShow in Internet Explorer.

Further options for Flash Player and other plugins can be found in the Settings menu in Internet Explorer. To find these, select the Settings button in the top-right corner of the browser window, and choose Manage add-ons.


Flash Player can be located by selecting the dropdown menu which shows Currently loaded add-ons by default. Change this option to All add-ons to reveal Shockwave Flash Plugin in the list of add-ons.


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