Bug 1623383 - Merge some conditions in URIFixup.jsm. r=harry

      });

    }

    // Now check whether "scheme" is something we don't know about.

    let isDefaultProtocolHandler =

      !isCommonProtocol &&

    let canHandleProtocol =

      scheme &&

      Services.io.getProtocolHandler(scheme) == defaultProtocolHandler;

      (isCommonProtocol ||

        Services.io.getProtocolHandler(scheme) != defaultProtocolHandler ||

        externalProtocolService.externalProtocolHandlerExists(scheme));

    if (!isDefaultProtocolHandler || !possiblyHostPortRegex.test(uriString)) {

    if (

      canHandleProtocol ||

      // If it's an unknown handler and the given URL looks like host:port or

      // has a user:password we can't pass it to the external protocol handler.

      // We'll instead try fixing it with http later.

      (!possiblyHostPortRegex.test(uriString) &&

        !userPasswordRegex.test(uriString))

    ) {

      // Just try to create an URL out of it.

      try {

        info.fixedURI = Services.io.newURI(uriString);

      }

    }

    // We're dealing with a theoretically valid URI but we have no idea how to

    // load it. (e.g. "christmas:humbug")

    // It's more likely the user wants to search, and so we chuck this over to

    // their preferred search provider.

    // TODO (Bug 1588118): Should check FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP

    // instead of FIXUP_FLAG_FIX_SCHEME_TYPOS.

    if (

      info.fixedURI &&

      isDefaultProtocolHandler &&

      keywordEnabled &&

      fixupFlags & FIXUP_FLAG_FIX_SCHEME_TYPOS &&

      scheme &&

      !externalProtocolService.externalProtocolHandlerExists(scheme)

      !canHandleProtocol

    ) {

      if (!userPasswordRegex.test(uriString)) {

        // This basically means we're dealing with a theoretically valid

        // URI... but we have no idea how to load it. (e.g. "christmas:humbug")

        // It's more likely the user wants to search, and so we

        // chuck this over to their preferred search provider instead:

      tryKeywordFixupForURIInfo(uriString, info, isPrivateContext, postData);

      } else {

        // If the given URL has a user:password we can't just pass it to the

        // external protocol handler; we'll try using it with http instead

        // later

        info.preferredURI = info.fixedURI = null;

      }

    }

    if (info.fixedURI) {