Add Tor Browser to mobile browsers (#1602)

docs/mobile-browsers.en.md

@@ -8,6 +8,27 @@ These are our currently recommended mobile web browsers and configurations. In g
 
 On Android, Firefox is still less secure than Chromium-based alternatives: Mozilla's engine, [GeckoView](https://mozilla.github.io/geckoview/), has yet to support [site isolation](https://hacks.mozilla.org/2021/05/introducing-firefox-new-site-isolation-security-architecture) or enable [isolatedProcess](https://bugzilla.mozilla.org/show_bug.cgi?id=1565196).
 
+### Tor Browser
+
+!!! recommendation
+
+    ![Tor Browser logo](assets/img/browsers/tor.svg){ align=right }
+
+    **Tor Browser** is the choice if you need anonymity, as it provides you with access to the Tor Bridges and [Tor Network](https://en.wikipedia.org/wiki/Tor_(network)), along with settings and extensions that are automatically configured by the default security levels: *Standard*, *Safer* and *Safest*.
+
+    The Tor Browser is designed to prevent fingerprinting, or identifying you based on your browser configuration. Therefore, it is imperative that you do **not** modify the browser beyond the default [security levels](https://tb-manual.torproject.org/security-settings/).
+
+    [:octicons-home-16: Homepage](https://www.torproject.org){ .md-button .md-button--primary }
+    [:pg-tor:](http://2gzyxa5ihm7nsggfxnu52rck2vv4rvmdlkiu3zzui5du4xyclen53wid.onion){ .card-link title=Onion }
+    [:octicons-info-16:](https://tb-manual.torproject.org/mobile-tor/){ .card-link title=Documentation }
+    [:octicons-code-16:](https://gitlab.torproject.org/tpo/applications/fenix){ .card-link title="Source Code" }
+    [:octicons-heart-16:](https://donate.torproject.org/){ .card-link title=Contribute }
+
+    ??? downloads
+
+        - [:fontawesome-brands-google-play: Google Play](https://play.google.com/store/apps/details?id=org.torproject.torbrowser)
+        - [:pg-f-droid: F-Droid](https://guardianproject.info/fdroid/)
+
 ### Brave
 
 !!! recommendation

docs/tools.en.md

@@ -42,6 +42,7 @@ For more details about each project, why they were chosen, and additional tips o
 
 <div class="grid cards" markdown>
 
+- ![Tor Browser logo](assets/img/browsers/tor.svg){ .twemoji } [Tor Browser (Android)](mobile-browsers.md#tor-browser)
 - ![Brave logo](assets/img/browsers/brave.svg){ .twemoji } [Brave (Android)](mobile-browsers.md#brave-android)
 - ![Safari logo](assets/img/browsers/safari.svg){ .twemoji } [Safari (iOS)](mobile-browsers.md#safari)