Flash Block is a menu bar app for easily toggling the flash browser plugin on and off.

When you need to maximise your Mac's battery life, enable flash block to prevent flash ad banners on webpages from needlessly consuming your CPU and battery.

There are two options:
1. Auto Kill Flash (always detects and disables Flash)
2. Kill Active Flash (only disables currently loaded Flash plugins - they will reappear if you refresh the page)

Supports FireFox, Chrome and of course, Safari.

Ratings and Reviews

2.8 out of 5

9 Ratings

9 Ratings

It's quirky, but it works!


Flash block does work! You have to quit Safari, then re-open it. It's not a perfect App, but I loathe flash! When I'm reading the NYTimes, CNN, Mac Daily News, or the Washington Post, the moving ads were so annoying that many times I just left the websites. Now, I just hit "Enable Auto Kill" and the moving ads go away. The "reader" function in the address bar of Mountain Lion OSX is better, but it is only activated when you're "inside" an article or story. When my system fan rev's at a high speed, I know Adobe Flash is the culprit,…so I just hit Enable Auto Kill. The battery on my Mac Book Pro Retina went down to 1% within three hours due to the Adobe Flash software.

Works Well


This product does as advertised. A previous reviewer commented that once it "killed" flash he was unable to bring it back except by restarting Safari. I am unable to replicate that behavior. Refreshing the page does indeed bring it back if Auto-Kill isn't enabled. It also works across all popular browsers. As of writing, it also works on Safari 5.2.

My wish list:
* (Configurable) keyboard shortcut for Kill Active Flash.
* (Configurable) keyboard shortcut for toggling Auto-Kill.
* Whitelisting domains to never block Flash.
* Support for "Reviving" Flash on a page. Once you kill it on a page, it's gone. Being able to click a placeholder to bring it back would be great.

My only concern about buying this in the App Store is that it seems unlikely to survive Apple's upcoming Sandboxing requirement.



Once you choose "Kill active flash" it stays killed. Refreshing the page does nothing. I had to close the app and then close Safari. Next time Safari launched Flash was working again.


Chatsworth and Whitton Limited
80.5 KB
Age Rating
Rated 4+
© 2017 Chatsworth and Whitton Limited


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer