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Disable view transitions in Facebook and Instagram in-app browser #31

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Disable view transitions in Facebook and Instagram in-app browser #31

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5 changes: 5 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,5 +1,10 @@
# Changelog

## [Unreleased]

### Fixed
- Blank pages on navigation in the Facebook and Instagram in-app browser on Android. View transitions are now disabled in these in-app browsers ([#30](https://github.com/mage-os/module-theme-optimization/issues/30)).

## [2.3.0] - 2026-05-11

### Added
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17 changes: 17 additions & 0 deletions view/base/templates/view-transitions.phtml
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Expand Up @@ -19,6 +19,23 @@ $style = <<<CSS
CSS;
echo $secureRenderer->renderTag('style', [], $style, false);

/*
* The Facebook and Instagram apps on Android ship their own Chromium based WebView, which starts the
* cross-document view transition but never finishes it, so the page stays blank after navigating.
* Inserted after the style above, so it wins and disables the transition in these in-app browsers.
*/
$inAppBrowserScript = <<<JS
(() => {
const userAgent = navigator.userAgent;
if (!/android/i.test(userAgent) || !/FBAN|FBAV|FB_IAB|Instagram/.test(userAgent)) return;

const style = document.createElement('style');
style.textContent = '@view-transition { navigation: none; }';
document.currentScript.after(style);
})();
JS;
echo $secureRenderer->renderTag('script', [], $inAppBrowserScript, false);

if ($viewModel->isEnabledForBfcache() === false) {
$script = <<<JS
window.addEventListener('pagereveal', (e) => {
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