diff --git a/README.md b/README.md
index 8336134164b44983f72a0552583ed8358282c3e7..41d0f80119c8daa5ce878afead9aad7dc62a681c 100644
--- a/README.md
+++ b/README.md
@@ -35,10 +35,8 @@ The parameters button permits to :
 - Filter URL per rules : activate the possiblity to filter url for each rules on the config panel, the header field will be modify only if the url contains the configurated value.
 
 
-## Firefox specific issues 
-- The rules are active in private window mode but you can't use the configuration window in this mode.
-- If  you check "never remember history" in firefox settings, the configuration will be lost when firefox exit.
-- According to the version of Firefox, the addition of a new header behaves differently. In the latest version, when you choose the "add" action and the header exist, it appends the value, while in the old version, it replaces it. If you want to modify an exiting header, you should use "modify" instead of "add"
+## Firefox specific issue
+According to the version of Firefox, the addition of a new header behaves differently. In the latest version, when you choose the "add" action and the header exist, it appends the value, while in the old version, it replaces it. If you want to modify an exiting header, you should use "modify" instead of "add"
   
 
 ## License
diff --git a/manifest.json b/manifest.json
index b0e0e8b53000d4908d5a70c9f90752e35a4706ea..161d1a4ad33630fba344ac825414d56718fde33a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,7 +3,7 @@
   "description": "Simple Modify headers ",
   "manifest_version": 2,
   "name": "simple-modify-headers",
-  "version": "1.6.2",
+  "version": "1.6.3",
   "homepage_url": "https://github.com/didierfred/SimpleModifyHeaders",
   "icons": {
     "48": "icons/modify-48.png"
@@ -21,6 +21,12 @@
     "default_icon": "icons/modify-32.png",
     "default_title": "Simple Modify Headers",
     "default_popup": "popup/menu.html"
+  },
+  
+  "applications": {
+  "gecko": {
+    "id": "{f6ca2dfb-43a6-4334-9fad-8d5a71a1fe67}",
+    "strict_min_version": "42.0"
+     }
   }
-
 }
diff --git a/package/SimpleModifyHeaders-Package v1.6.3.zip b/package/SimpleModifyHeaders-Package v1.6.3.zip
new file mode 100644
index 0000000000000000000000000000000000000000..0ca53fdefa7b64fe05b9c881209fb77c0c0432b2
Binary files /dev/null and b/package/SimpleModifyHeaders-Package v1.6.3.zip differ
diff --git a/popup/config.html b/popup/config.html
index 8756209cd8f19e2136acde1b7c3a48bfb89cb7ad..549e0f1eb8cf6a7738a8d1fbb1b43cc59c8258c2 100644
--- a/popup/config.html
+++ b/popup/config.html
@@ -82,7 +82,7 @@
 						<em style="font-size:10pt"> * Informations on url pattern can be found <a href="https://developer.chrome.com/extensions/match_patterns" target="_blank"> here.</a> <br> An empty string on the field will select all urls. It's possible to select mutliple url patterns using semicolon(;) separator </em>
  					</td>
 					<td style="text-align:right">
-						<a href="https://github.com/didierfred/SimpleModifyHeaders/tree/v1.6.2" target="_blank"> <span class="glyphicon glyphicon-question-sign"></span> About </a>
+						<a href="https://github.com/didierfred/SimpleModifyHeaders/tree/v1.6.3" target="_blank"> <span class="glyphicon glyphicon-question-sign"></span> About </a>
 					</td>
 				</tr>
 		</table>