Differences

This shows you the differences between two versions of the page.

--- zac:z4f [2010/05/07 23:10]
aspectscript created
+++ zac:z4f [2010/05/10 18:50] (current)
aspectscript
@@ Line 1: / Line 1: @@
 ====== ZAC for Firefox ======
-zac4firefox is a Firefox extension that restrict the actions that can be performed by the scripts of pages visited by the user.
+zac4firefox is a Firefox extension that enables client-side enforcement of [[:zac|ZAC]] policies. The idea is to be able to restrict the actions that the scripts of pages visited by the user can perform.
 ====== Download zac4firefox ======
-The extension can be downloaded from here.
+The extension can be downloaded from [[/external/zac/plugin/zac4firefox.xpi|here]]. The extension is compatible with Firefox 3.6.
 ====== Current Limitations ======
-  * Due to the performance penalties introduced by the transformation phase required by AspectScript, the observable overhead ranges from acceptable to very high, depending on the load of JavaScript computation of the visited page
+  * Due to the performance penalties introduced by the transformation phase required by AspectScript, the observable overhead ranges from acceptable to very high, depending on the load of JavaScript computation of the visited page.
-  * Due to the limitations introduced by the parser used by AspectScript (the parser from the Narcissus project), some scripts are not transformed, and therefore are not subject to ZAC policies. Then this occur, a notification is presented to the user.
+  * Due to the limitations introduced by the parser used by AspectScript (the JavaScript parser from the Narcissus project), some scripts are not transformed, and therefore are not subject to ZAC policies. When this occur, the following notification is presented to the user:
+{{:zac:cannot-parse.png|}}
+  * Once pages and scripts are transformed, ZAC caches them to improve the performance the next time the page is visited.  This cache is erased when the browser is started and when the active policies change.