Updated FAQ

FAQ.md

@@ -5342,7 +5342,7 @@ Send is only available in non-Play Store versions of the app (since version 1.19
 
 Password protected content is a simple, yet secure form of end-to-end encryption that requires no configuration.
 
-How to use: select some text by long pressing it, and in the style toolbar at the bottom tap on the *<ins>A</ins>*-button and select *Password protect* in the pop-up menu.
+How to use: select some text by long pressing it, and in the style toolbar at the bottom tap on the padlock-button and select *Password protect* in the pop-up menu.
 This will replace the selected content with a link that the recipient can click to decrypt the content on a dedicated static web page.
 
 Password protected content is sent as a [URI fragment](https://en.wikipedia.org/wiki/URI_fragment) and decrypted in the browser with JavaScript.

index.html

@@ -2657,7 +2657,7 @@ _submission._tcp SRV 0 1 587 smtp.example.com.</code></pre>
 <p><a name="faq184"></a> <strong>(184) How do I password protect content?</strong></p>
 <p>🌎 <a href="https://translate.google.com/translate?sl=en&amp;u=https%3A%2F%2Fm66b.github.io%2FFairEmail%2F%23faq184">Google Translate</a></p>
 <p>Password protected content is a simple, yet secure form of end-to-end encryption that requires no configuration.</p>
-<p>How to use: select some text by long pressing it, and in the style toolbar at the bottom tap on the <em><ins>A</ins></em>-button and select <em>Password protect</em> in the pop-up menu. This will replace the selected content with a link that the recipient can click to decrypt the content on a dedicated static web page.</p>
+<p>How to use: select some text by long pressing it, and in the style toolbar at the bottom tap on the padlock-button and select <em>Password protect</em> in the pop-up menu. This will replace the selected content with a link that the recipient can click to decrypt the content on a dedicated static web page.</p>
 <p>Password protected content is sent as a <a href="https://en.wikipedia.org/wiki/URI_fragment">URI fragment</a> and decrypted in the browser with JavaScript. In other words, protected content is never stored on or seen by third party servers. Since version 1.1990 received protected content will be decrypted by the app, with as fallback decryption in the browser for other email clients.</p>
 <p>Password protected content is encrypted with <a href="https://en.wikipedia.org/wiki/Advanced_Encryption_Standard">AES</a> / <a href="https://en.wikipedia.org/wiki/Galois/Counter_Mode">GCM</a> with a 256 bits key derived with <a href="https://en.wikipedia.org/wiki/PBKDF2">PBKDF2</a> / <a href="https://en.wikipedia.org/wiki/Secure_Hash_Algorithms">SHA</a>-512 with 120,000 iterations. With a sufficiently long/complex password, which is communicated to the recipient securely, this is considered safe in 2022 and for the foreseeable future.</p>
 <p>Due to <a href="https://stackoverflow.com/a/417184/1794097">length limitations</a> of <a href="https://en.wikipedia.org/wiki/URL">URL</a>s and Android <a href="https://developer.android.com/reference/android/os/TransactionTooLargeException">binder limitations</a>, the maximum content size is 1,500 bytes, which includes <a href="https://en.wikipedia.org/wiki/HTML">HTML</a> formatting tags. Images will be replaced with placeholders to reduce the content size, but other formatting, like bold, italic, links, etc., will be retained. If the content is too long, there will be a popup <em>Text too long</em>.</p>