| Index: include.preload.js | 
| diff --git a/include.preload.js b/include.preload.js | 
| index 93acaeacd78ee37fc74a9686c25bf6dcd66103e9..2828275a319ac7dbfac4ffcf71f43c1a75e58952 100644 | 
| --- a/include.preload.js | 
| +++ b/include.preload.js | 
| @@ -15,8 +15,6 @@ | 
| * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. | 
| */ | 
| -var MutationObserver = window.MutationObserver || window.WebKitMutationObserver; | 
| - | 
| var typeMap = { | 
| "img": "IMAGE", | 
| "input": "IMAGE", | 
| @@ -164,13 +162,12 @@ function checkCollapse(element) | 
| { | 
| collapseElement(); | 
| - if (MutationObserver) | 
| - new MutationObserver(collapseElement).observe( | 
| - element, { | 
| - attributes: true, | 
| - attributeFilter: ["style"] | 
| - } | 
| - ); | 
| + new MutationObserver(collapseElement).observe( | 
| + element, { | 
| + attributes: true, | 
| + attributeFilter: ["style"] | 
| + } | 
| + ); | 
| } | 
| } | 
| ); |