--- title: The Firebase JS SDK Is Dropping Support For Internet... description: Starting with version 9.8.0, the Firebase JS SDK will no longer support Internet Explorer, following Microsoft's own moves to end support for IE11 in Microsoft... canonical: https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The Firebase JS SDK Is Dropping Support For Internet Explorer | daily.dev og:description: Starting with version 9.8.0, the Firebase JS SDK will no longer support Internet Explorer, following Microsoft's own moves to end support for IE11 in Microsoft... og:url: https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u og:image: https://api.daily.dev/og/posts/X4qwVUC3U.png og:image:alt: The Firebase JS SDK Is Dropping Support For Internet Explorer og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # The Firebase JS SDK Is Dropping Support For Internet Explorer **[Firebase](https://daily.dev/sources/firebase-blog)** · 2 min read · 0 upvotes · 0 comments ## Summary Starting with version 9.8.0, the Firebase JS SDK will no longer support Internet Explorer, following Microsoft's own moves to end support for IE11 in Microsoft 365 and the IE desktop app. Dropping IE support lets the SDK adopt modern features like ESM exports and reduce bundle size by removing IE-specific code branches. Developers who still need IE support must stay on versions below 9.8.0, which will no longer receive bug fixes; the team will not maintain a polyfill list for IE compatibility. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Does Firebase JS SDK still support Internet Explorer? No, starting with version 9.8.0 the Firebase JS SDK no longer supports Internet Explorer. Developers who still need IE support must stay on a version earlier than 9.8.0, but those older versions will not receive further bug fixes. The change lets the SDK use modern features like ESM exports and reduces bundle size by removing IE-specific code branches. _Track SDK version deprecations like this on daily.dev before they break your build._ ### What version of Firebase JS SDK should I use if I still need Internet Explorer support? Use any version below 9.8.0, since that is the last release supporting Internet Explorer. Firebase will not backport bug fixes to those older versions, and it will not maintain a list of polyfills needed to keep IE working, so ongoing IE support becomes the developer's own responsibility. _daily.dev helps developers weighing legacy browser support against SDK upgrades stay informed._ ## Similar posts on daily.dev - [JavaScript Weekly Issue 769: January 20, 2026](https://daily.dev/posts/javascript-weekly-issue-769-january-20-2026-24f3jsfa5) · JavaScript Weekly · 10 upvotes · 0 comments - [Legacy Internet Explorer Code Removed](https://daily.dev/posts/legacy-internet-explorer-code-removed-rfdh6rsns) · Make WordPress Core · 1 upvotes · 0 comments - [Frontend Focus Issue 725: January 21, 2026](https://daily.dev/posts/frontend-focus-issue-725-january-21-2026-povtukrei) · Frontend Focus · 3 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#firebase](https://daily.dev/tags/firebase), [#microsoft-edge](https://daily.dev/tags/microsoft-edge) [View this post on daily.dev](https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"The Firebase JS SDK Is Dropping Support For Internet Explorer","url":"https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u"},"datePublished":"2026-08-23T12:17:42.954Z","dateModified":"2026-08-23T12:26:14.557Z","description":"Starting with version 9.8.0, the Firebase JS SDK will no longer support Internet Explorer, following Microsoft's own moves to end support for IE11 in Microsoft...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7ed721de96163685d26ab7e314be3ebc?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7ed721de96163685d26ab7e314be3ebc?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Firebase","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Firebase","logo":"https://media.daily.dev/image/upload/s--i395oqZH--/f_auto,q_auto/v1787487448/logos/firebase-blog?_a=BAMAMicg0","url":"https://daily.dev/sources/firebase-blog"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"javascript,firebase,microsoft-edge","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Firebase","item":"https://daily.dev/sources/firebase-blog"},{"@type":"ListItem","position":3,"name":"The Firebase JS SDK Is Dropping Support For Internet Explorer"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/the-firebase-js-sdk-is-dropping-support-for-internet-explorer-x4qwvuc3u#faq","mainEntity":[{"@type":"Question","name":"Does Firebase JS SDK still support Internet Explorer?","acceptedAnswer":{"@type":"Answer","text":"No, starting with version 9.8.0 the Firebase JS SDK no longer supports Internet Explorer. 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