A way to enable flash for specific sites only?

Solution 1:

The procedure for the current version of Chrome is detailed below.

1. Open a tab with chrome://flags and verify the the following are set to Default : Prefer HTML over Flash and Run all Flash content when Flash setting is set to “allow”
2. Open another tab with chrome://components and under Adobe Flash Player, click Check for update and wait for it to finish
3. Click on the Chrome menu button at the top-right and then on Settings
4. Click on Show Advanced Settings
5. Under Privacy click on Content Settings
6. In the dialog, under Flash ensure that Ask first before allowing sites to run Flash (recommended) is selected (don't do Allow sites to run Flash)
7. Now Flash is allowed and you need to enable it for your specific sites
8. The hard way to specify an allowed site is under Content Settings – Flash to click on the Manage exceptions button and add each site's URL with Behavior set to Allow
9. The easy way to allow a site is to go to it and then click on the little icon to the left of the URL in the address bar, and set Flash to Always allow on this site instead of the default which does not work in the latest version of Chrome.

More detailed instructions with screenshots can be found in this article.

Solution 2:

You could use an add-on to do this.

NoScript Firefox

Flashblock Firefox

Flashblock Chrome

Solution 3:

In addition to aforementioned solutions, for Firefox there is a native (built-in) one too:

Click on the icon in the beginning of the address bar in Firefox

1. More Information...
2. Permissions
3. Active Plugins

And now you have full control over this page.

Solution 4:

For those using Opera who wish to do the same thing, you can shut off plug-ins (which includes Adobe Flash) for any web site by following these simple steps:

1. Right-click on the web page
2. Select "Edit Site Preferences..."
3. Activate the "Content" tab
4. Disable the "Enable plug-ins" checkbox
5. Click the "OK" button

To enable again, repeat the above steps but read step 4 above as "Enable" instead of "Disable."