Update documentation and new Browsertime

docs/_includes/version/browsertime.txt

@@ -1 +1 @@
-21.5.0
+21.5.1

docs/documentation/browsertime/configuration/config.md

@@ -186,7 +186,7 @@ Options:
       --delay                                      Delay between runs, in milliseconds  [number] [default: 0]
   -r, --requestheader                              Request header that will be added to the request. Add multiple instances to add multiple request headers. Works for Firefox and Chrome. Use the following format key:value
       --cookie                                     Cookie that will be added to the request. Add multiple instances to add multiple request cookies. Works for Firefox and Chrome. Use the following format cookieName=cookieValue
-      --injectJs                                   Inject JavaScript into the current page at document_start. Works for Firefox and Chrome. More info: https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/contentScripts
+      --injectJs                                   Inject JavaScript into the current page at document_start. Works for Firefox, Chrome and Edge. When injecting to Firefox make sure to wrap the code in a function!
       --block                                      Domain to block or URL or URL pattern to block. If you use Chrome you can also use --blockDomainsExcept (that is more performant). Works in Chrome/Edge. For Firefox you can only block domains.
       --percentiles                                The percentile values within the data browsertime will calculate and report. This argument uses Yargs arrays and you you to set them correctly it is recommended to use a configuraration file instead.  [array] [default: [0,10,90,99,100]]
       --decimals                                   The decimal points browsertime statistics round to.  [number] [default: 0]