Update installation instructions

README.md

@@ -13,6 +13,8 @@
 [Download and install the latest version](https://bitbucket.org/magnolia1234/bypass-paywalls-firefox-clean/downloads)  
 Here you can also find a limited permissions version (custom sites will not be working though).  
 Install add-on by downloading xpi-file.  
+On Android this add-on only works with Firefox 68 (Fennec); Firefox 79 (Fenix) only supports 9 add-ons (for now).  
+So don't update to Firefox 79 or use F-droid's [Fennec-release](https://f-droid.org/en/packages/org.mozilla.fennec_fdroid/)
 
 ### List of supported websites
 ##### World news

contentScript.js

@@ -122,7 +122,7 @@ else if (matchDomain("washingtonpost.com")) {
     }
 }
 
-else if (matchDomain("wsj.com") & !matchDomain("cn.wsj.com")) {
+else if (matchDomain("wsj.com") && !matchDomain("cn.wsj.com")) {
     if (location.href.includes('/articles/')) {
         const close_button = document.querySelector('div.close-btn[role="button"]');
         if (close_button)