[rust] Use Firefox history major releases endpoint for version discovery

Author: bonigarcia

rust/src/firefox.rs

@@ -55,6 +55,7 @@ const FIREFOX_CANARY_LABEL: &str = "FIREFOX_NIGHTLY";
 const FIREFOX_ESR_LABEL: &str = "FIREFOX_ESR";
 const FIREFOX_VERSIONS_ENDPOINT: &str = "firefox_versions.json";
 const FIREFOX_HISTORY_ENDPOINT: &str = "firefox_history_stability_releases.json";
+const FIREFOX_HISTORY_MAJOR_ENDPOINT: &str = "firefox_history_major_releases.json";
 const FIREFOX_HISTORY_DEV_ENDPOINT: &str = "firefox_history_development_releases.json";
 const FIREFOX_NIGHTLY_URL: &str =
     "https://download.mozilla.org/?product=firefox-nightly-latest-ssl&os={}&lang={}";
@@ -475,12 +476,15 @@ impl SeleniumManager for FirefoxManager {
             }
 
             let mut firefox_versions =
-                self.request_versions_from_online(FIREFOX_HISTORY_ENDPOINT)?;
+                self.request_versions_from_online(FIREFOX_HISTORY_MAJOR_ENDPOINT)?;
             if firefox_versions.is_empty() {
-                firefox_versions =
-                    self.request_versions_from_online(FIREFOX_HISTORY_DEV_ENDPOINT)?;
+                firefox_versions = self.request_versions_from_online(FIREFOX_HISTORY_ENDPOINT)?;
                 if firefox_versions.is_empty() {
-                    return self.unavailable_discovery();
+                    firefox_versions =
+                        self.request_versions_from_online(FIREFOX_HISTORY_DEV_ENDPOINT)?;
+                    if firefox_versions.is_empty() {
+                        return self.unavailable_discovery();
+                    }
                 }
             }