updated "Known Issues"

README.MD

@@ -58,7 +58,7 @@ See https://addons.mozilla.org/en-US/firefox/addon/single-file/statistics/?last=
 
 ## Known Issues
 - All browsers:
-  - For security reasons, you cannot save pages hosted on https://chrome.google.com or https://addons.mozilla.org and some other Mozilla domains. When this happens, the label "🛇" is displayed on top of the SingleFile icon.
+  - For security reasons, you cannot save pages hosted on https://chrome.google.com, https://addons.mozilla.org and some other Mozilla domains. When this happens, the label "🛇" is displayed on top of the SingleFile icon.
   - The last saved path cannot be remembered by default. To circumvent this limitation, disable the option "Misc > Save pages in background".
   - The following characters are replaced with _ in filenames: ~, \\, ?, %, *, :, |, ", <, >  
 - Chrome/Opera:

extension/ui/pages/help.html

@@ -481,8 +481,8 @@
 					<li>
 						All browsers
 						<ul>
-							<li>For security reasons, you cannot save pages hosted on https://chrome.google.com or
-								https://addons.mozilla.org.</li>
+							<li>For security reasons, you cannot save pages hosted on https://chrome.google.com, https://addons.mozilla.org 
+								and some other Mozilla domains. When this happens, the label "🛇" is displayed on top of the SingleFile icon.</li>
 							<li>The last saved path cannot be remembered by default. To circumvent this limitation, disable the option
 								"Misc. &gt; Save pages in background".</li>
 							<li>The following characters are replaced with _ in filenames: ~, \, ?, %, *, :, |, ", &lt;, &gt;</li>