Fix Firefox for Android compatbility

There was an issue in the AddonSettings and FF for Android does not support the "loadReplace" API.

src/background/modules/MastodonRedirect.js

@@ -24,10 +24,7 @@ async function triggerRemoteAction(uri) {
  // own server
  if (uri.startsWith(`https://${ownMastodon.server}`)) {
  // just redirect to given input URL, if it is one the same server
- return browser.tabs.update({
- loadReplace: true,
- url: uri
- });
+ return NetworkTools.redirectToWebsite(uri);
  }
 
  const mastodonApiUrl = await Mastodon.getSubscribeApiUrl(ownMastodon, uri);
@@ -47,21 +44,14 @@ async function triggerRemoteAction(uri) {
  // error happened, let's try redirect again without cache
  // (the API endpoint could have been changed)
  const mastodonApiUrl = await Mastodon.getSubscribeApiUrl(ownMastodon, uri, true);
- const url = (new URL(mastodonApiUrl)).toString();
 
- browser.tabs.update({
- loadReplace: true,
- url: url
- });
+ NetworkTools.redirectToWebsite(mastodonApiUrl);
  };
 
  NetworkTools.webRequestListen(url, "onCompleted", verifyRequest);
 
  // finally redirect
- return browser.tabs.update({
- loadReplace: true,
- url: url
- });
+ return NetworkTools.redirectToWebsite(url);
 }
 
 /**

src/background/modules/NetworkTools.js

@@ -7,8 +7,7 @@
 /**
  * Listen to a web request of this URL.
  *
- * @function
- * @private
+ * @public
  * @param {string} expectedUrl
  * @param {string} onAction
  * @param {function} handleWebRequest
@@ -26,8 +25,7 @@ export function webRequestListen(expectedUrl, onAction, handleWebRequest, extraI
 /**
  * Stops listening to a web request of this URL.
  *
- * @function
- * @private
+ * @public
  * @param {string} onAction
  * @param {function} handleWebRequest
  * @returns {void}
@@ -37,3 +35,30 @@ export function webRequestListenStop(onAction, handleWebRequest) {
  handleWebRequest
  );
 }
+
+/**
+ * Redirects the current tab to a new site.
+ *
+ * It does try to replace the site's history so the old URL does not appear
+ * in the history, but this is not always possible.
+ *
+ * @public
+ * @param {string|URL} url
+ * @returns {Promise}
+ * @see {@link https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/tabs/update}
+ */
+export function redirectToWebsite(url) {
+ if (url instanceof URL) {
+ url = (new URL(url)).toString();
+ }
+
+ // Firefox for Android e.g. does not support "loadReplace"
+ try {
+ return browser.tabs.update({
+ loadReplace: true,
+ url: url
+ });
+ } catch (e) {
+ return browser.tabs.update({ url });
+ }
+}