Added FFSend FAQ

FAQ.md

@@ -385,6 +385,7 @@ Fonts, sizes, colors, etc should be material design whenever possible.
 * [(180) How do I use LanguageTool?](#user-content-faq180)
 * [(181) How do I use VirusTotal?](#user-content-faq181)
 * [(182) How can I select how a link should be opened?](#user-content-faq182)
+* [(183) How do I use FFSend?](#user-content-faq183)
 
 [I have another question.](#user-content-get-support)
 
@@ -4893,6 +4894,23 @@ Please see [this FAQ](#user-content-faq35) on why you should be careful when ope
 
 <br />
 
+<a name="faq183"></a>
+**(183) How do I use FFSend?**
+
+[FFSend](https://github.com/timvisee/send) is designed as temporary encrypted file storage.
+Only people with a link to a file can download and decrypt a file.
+
+FFSend integration needs to be enabled in the miscellaneous settings.
+
+Optionally, you can change the host address of the FFSend server.
+Please [see here](https://github.com/timvisee/send-instances) for a list of public instances.
+
+To upload a file and insert a link, you can use the insert link button in the message editor.
+
+FFSend is only available in non-Play Store versions of the app (since version 1.1947).
+
+<br />
+
 <h2><a name="get-support"></a>Get support</h2>
 
 &#x1F30E; [Google Translate](https://translate.google.com/translate?sl=en&u=https://github.com/M66B/FairEmail/blob/master/FAQ.md%23user-content-get-support)

app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java

@@ -729,7 +729,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         ibFFSend.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Helper.view(v.getContext(), Uri.parse(FFSend.FF_INSTANCES), true);
+                Helper.viewFAQ(v.getContext(), 183);
             }
         });