Remote Tab Opener — FAQ & Troubleshooting

1) Installation

Install the extension, then keep it enabled. The extension requests tab access and host access; you still control what can be automated via the Allow-list.

No. Everything runs locally in your browser. Your page talks to the extension through a safe postMessage bridge (no proxies, no cookies interception).

2) Detect the Extension

Use the official helper API (RTOForm) and handle EXT_NOT_DETECTED gracefully.

Minimal detect (v7.11.2+)

<script src="/RTO_helpers/RTO_form_api.js"></script>
<script>
  // Show a friendly banner if the extension is missing.
  RTOForm.detect({ timeout: 2000 })
    .then(function (info) {
      if (!info || info.ready !== true) throw { code: 'EXT_NOT_DETECTED' };
      console.log('RTO OK', info.version || '');
    })
    .catch(function (err) {
      var code = (err && err.code) ? err.code : 'EXT_NOT_DETECTED';
      console.warn('RTO not available:', code);
    });
</script>

3) Allow-list (required)

You must explicitly allow the target host(s) in the extension UI.
If a host is not allow-listed, commands are rejected with DOMAIN_NOT_ALLOWED.
Tip: show an “Allow-list this domain” CTA and retry once the user confirms.

4) Remote Tab Control

Use tabKey to consistently target a named tab across your flow.

Open → Navigate → Focus

<script src="/RTO_helpers/RTO_form_api.js"></script>
<script>
  var tabKey = 'auth';

  RTOForm.openTab({ tabKey: tabKey, url: 'https://example.com/login' })
    .then(function () {
      return RTOForm.waitForNavigation({ tabKey: tabKey, timeout: 15000 });
    })
    .then(function () {
      return RTOForm.focusTab({ tabKey: tabKey });
    })
    .then(function () {
      return RTOForm.getUrl({ tabKey: tabKey });
    })
    .then(function (res) {
      console.log('Current URL:', (res && res.ok && res.data) ? res.data.url : '');
    })
    .catch(function (err) {
      console.warn('Tab flow failed:', (err && err.code) || err);
    });
</script>

If you see NO_CONTROLLED_TAB, the tab is not available (closed, not adopted, or not on an allow-listed host).

5) Named DOM actions

DOM actions run inside the target tab via a content script. Prefer stable selectors and wait before acting.

Fill a login form safely

<script src="/RTO_helpers/RTO_form_api.js"></script>
<script>
  var tabKey = 'auth';

  // Wait for an element to exist, then type + click.
  RTOForm.waitForSelector({ tabKey: tabKey, selector: '#email', timeout: 10000 })
    .then(function () {
      return RTOForm.setValue({ tabKey: tabKey, selector: '#email', value: 'user@example.com' });
    })
    .then(function () {
      return RTOForm.setValue({ tabKey: tabKey, selector: '#password', value: '***' }); // never log real passwords
    })
    .then(function () {
      return RTOForm.click({ tabKey: tabKey, selector: 'button[type="submit"]' });
    })
    .catch(function (err) {
      var code = (err && err.code) || 'ERROR';
      if (code === 'ELEMENT_NOT_FOUND') {
        console.warn('Selector not found — update the selector or wait longer.');
      } else {
        console.warn('DOM action failed:', code);
      }
    });
</script>

6) Errors & fixes

Error	Meaning	Common fix
`EXT_NOT_DETECTED`	Extension is not installed / disabled / not responding.	Show install/enable CTA; retry `RTOForm.detect()`.
`DOMAIN_NOT_ALLOWED`	Target host is not in the Allow-list.	Ask the user to add the host in the extension UI, then retry.
`NO_CONTROLLED_TAB`	No tab matching `tabKey` is under control.	Open/adopt the tab again; verify it’s on an allow-listed host.
`ELEMENT_NOT_FOUND`	Selector didn’t match any element.	Use a more stable selector; call `waitForSelector` first.
`TIMEOUT`	Wait exceeded the configured time.	Increase timeout; confirm navigation actually happens; add intermediate waits.

7) Privacy & Security

Local-only: commands and results stay in your browser.
Deny-by-default: the Allow-list is required for cross-domain control.
No arbitrary code execution: only documented tab and DOM commands.

8) Best practices

Always start with detect, then show a clear status UI.
Keep tabKey stable per workflow (auth, monitor, ops).
Prefer waitForSelector before click/setValue.
Never print secrets to logs; treat form inputs as sensitive.

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