Added Safari Support

_locales/en_US/messages.json

 {
   "add": {
     "description": "This is the label for the 'Add' buttons.",
     "message": "Add"
   },
   "add_domain_button": {
     "message": "Add domain"
   },
   "add_filter_button": {
     "message": "Add filter"
@@ skipping 11 matching lines @@
     "description": "Label for 'Block Element' context menu item",
     "message": "Block Element"
   },
   "cancel": {
     "description": "Cancel button label",
     "message": "Cancel"
   },
   "clickhide_instructions": {
     "message": "After closing this popup, click (or right-click) an element on the page."
   },
-  "description": {
+  "description_chrome": {

[Wladimir Palant, 2013/10/31 14:07:06]

While we are at it, please add "Must not be more than 132 characters wide"
description comment here.

[Wladimir Palant, 2013/10/31 14:42:13]

Feel free to address this comment.

     "message": "The free adblock tool for Chrome: Blocks annoying video ads on YouTube, Facebook ads, banners and much more."
   },
+  "description_opera": {
+    "message": "The free adblock tool for Opera: Blocks annoying video ads on YouTube, Facebook ads, banners and much more."
+  },
+  "description_safari": {
+        "description": "Must not be more than 100 characters wide",

[Wladimir Palant, 2013/10/31 14:07:06]

Wrong indentation here: tab used instead of spaces?

Could you check whether that's really the limitation? Getting translators to
observe it will be tricky.

[Sebastian Noack, 2013/10/31 14:40:37]

The extension builder shows a warning, saying that it will be truncated, if
longer than 100 chars. But at least under Preferences->Extensions, the
description isn't truncated. There might still be other places (I don't know any
at the moment) where the description is shown too, and will be truncated.
However I have already uploaded a new version that adds the full description
again and removes that comment, as discussed in IRC.

+    "message": "The free adblock tool for Safari: Blocks annoying ads on YouTube, Facebook ads, banners and more."
+  },
   "disable_inline": {
     "message": "Disable inline text ads"
   },
   "disabled_for_these_domains": {
     "message": "Adblock Plus is disabled for the domains listed below. You can add a domain either via the Adblock Plus icon in the address bar or by typing the domain (not a URL) in the box and clicking the \"Add domain\" button."
   },
   "easy_create_filter": {
     "description": "Button label in popup balloon",
     "message": "Easy create filter"
   },
   "edit_filters_raw": {
     "message": "Edit filters as raw text"
   },
   "enable_only_the": {
-    "message": "Enable only the filter lists you need. Too many can make Chrome unresponsive."
+    "message": "Enable only the filter lists you need. Too many can make your browser unresponsive."
   },
   "enabled_for_site": {
     "description": "Popup balloon checkbox label",
     "message": "Enabled for this site"
   },
   "filter_lists": {
     "description": "This is a tab heading.",
     "message": "Filter lists"
   },
   "filter_must_follow_syntax": {
@@ skipping 104 matching lines @@
     "message": "Please choose a filter subscription from the list:"
   },
   "update_now": {
     "message": "Update now"
   },
   "whitelisted_domains": {
     "description": "This is a tab heading.",
     "message": "Whitelisted domains"
   }
 }