added known issue in Chrome

Former-commit-id: 4c5f645ec1ef249cab2601a6f2a02955ded4bcc1

README.MD

@@ -94,6 +94,7 @@ See https://github.com/gildas-lormeau/SingleFile/blob/master/faq.md4
 - Chrome:
   - You must enable the option "Allow access to file URLs" in the extension page to display the infobar when viewing a saved page, or to save a page stored on the filesystem.
   - If the filename of a saved page looks like "56833935-156b-4d8c-a00f-19599c6513d3", disable the option "Misc > Save pages in background". Reinstalling the browser may also fix this issue.
+  - Disabling the option 'File name > open the "Save as" dialog to confirm the file name' will work if and only if "Ask where to save each file before downloading" is disabled in chrome://settings/downloads.
 - Firefox:
   - The "file name conflict resolution" option does not work if set to "prompt for a name"
 - Waterfox

extension/ui/pages/help.html

@@ -453,6 +453,9 @@
 							<li>If the filename of a saved page looks like "56833935-156b-4d8c-a00f-19599c6513d3",
 								disable the option "Misc. &gt; Save pages in background". Reinstalling the browser may
 								also fix this issue.</li>
+							<li>Disabling the option 'File name &gt; open the "Save as" dialog to confirm the file name'
+								will work if and only if "Ask where to save each file before downloading" is disabled in
+								chrome://settings/downloads</li>
 						</ul>
 					</li>
 					<li> Firefox <ul>