--- title: WebTransport Headers, Zstd WAL Compression, and Copilot... description: Microsoft Edge 156 switches new IndexedDB stores from LevelDB to SQLite without changing the IndexedDB API, aiming to improve reliability and performance.... canonical: https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: WebTransport Headers, Zstd WAL Compression, and Copilot Studio Conversation Harness | daily.dev og:description: Microsoft Edge 156 switches new IndexedDB stores from LevelDB to SQLite without changing the IndexedDB API, aiming to improve reliability and performance.... og:url: https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj og:image: https://api.daily.dev/og/posts/Xup0rhKMJ.png og:image:alt: WebTransport Headers, Zstd WAL Compression, and Copilot Studio Conversation Harness 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. # WebTransport Headers, Zstd WAL Compression, and Copilot Studio Conversation Harness **[Microsoft Developer](https://daily.dev/sources/microsoftdeveloper)** · 2 min read · 0 upvotes · 0 comments ## Summary Microsoft Edge 156 switches new IndexedDB stores from LevelDB to SQLite without changing the IndexedDB API, aiming to improve reliability and performance. Failed JavaScript module imports can now be retried after issues like network failures. WebTransport gains request and response headers during the initial connection, letting apps handle auth, routing and compatibility negotiation without putting tokens in URLs. Separately, Azure Database for PostgreSQL Flexible Server's October release adds ZSTD compression for write-ahead logs on PostgreSQL 15, 16 and 17, plus updates to pgvector (0.8.7) and other extensions. Copilot Studio also gets a public preview of a customer conversation harness, a runtime for orchestrating teams of agents across voice and chat channels. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What storage engine does Microsoft Edge 156 use for IndexedDB now? Microsoft Edge 156 switches IndexedDB stores to use SQLite instead of LevelDB under the hood, aiming to improve reliability and performance. The IndexedDB API itself does not change, so existing application code keeps working, but the underlying runtime behavior can shift even without code changes. _Developers tracking browser-level runtime changes affecting IndexedDB can follow updates like this on daily.dev._ ### Does WebTransport support custom headers during the initial connection? Yes, WebTransport now gains request and response headers during the initial connection in Microsoft Edge 156. This gives applications a cleaner way to handle authentication, routing, and compatibility negotiation without embedding tokens in URLs or adding an extra network roundtrip. _Teams evaluating WebTransport for auth and routing can keep up with browser API changes on daily.dev._ ### Does Azure Database for PostgreSQL support ZSTD compression for write-ahead logs? Yes, the October maintenance release for Azure Database for PostgreSQL Flexible Server adds ZSTD compression for write-ahead logs on PostgreSQL 15, 16, and 17. This gives teams another compression option to balance CPU cost against WAL volume, useful for write-heavy systems or replicas moving data across regions. The release also updates pgvector to 0.8.7. _Teams weighing WAL compression trade-offs for PostgreSQL can track release details like this on daily.dev._ ## Similar posts on daily.dev - [SQLite Across Every Port: One Contract, One Encrypted File Format](https://daily.dev/posts/sqlite-across-every-port-one-contract-one-encrypted-file-format-pohxsagfo) · Foojay.io · 1 upvotes · 0 comments - [PostgreSQL Like A Pro: Build, query, and troubleshoot without leaving VS Code](https://daily.dev/posts/postgresql-like-a-pro-build-query-and-troubleshoot-without-leaving-vs-code-iolbaeonx) · DevBlogs · 0 upvotes · 0 comments --- Tags: [#azure](https://daily.dev/tags/azure), [#postgresql](https://daily.dev/tags/postgresql), [#microsoft-edge](https://daily.dev/tags/microsoft-edge) [View this post on daily.dev](https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj) ```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":"WebTransport Headers, Zstd WAL Compression, and Copilot Studio Conversation Harness","url":"https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj"},"datePublished":"2026-11-02T18:52:42.376Z","dateModified":"2026-11-02T18:53:06.957Z","description":"Microsoft Edge 156 switches new IndexedDB stores from LevelDB to SQLite without changing the IndexedDB API, aiming to improve reliability and performance....","image":"https://i.ytimg.com/vi/y7r-UYR1Lz0/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/y7r-UYR1Lz0/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Microsoft Developer","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":"Microsoft Developer","logo":"https://media.daily.dev/image/upload/s--xZzU3zUq--/f_auto/v1746714872/logos/microsoftdeveloper","url":"https://daily.dev/sources/microsoftdeveloper"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"azure,postgresql,microsoft-edge","timeRequired":"PT2M","video":{"@type":"VideoObject","name":"WebTransport Headers, Zstd WAL Compression, and Copilot Studio Conversation Harness","description":"Microsoft Edge 156 switches new IndexedDB stores from LevelDB to SQLite without changing the IndexedDB API, aiming to improve reliability and performance....","thumbnailUrl":"https://i.ytimg.com/vi/y7r-UYR1Lz0/sddefault.jpg","uploadDate":"2026-11-02T18:52:42.376Z","duration":"PT2M","url":"https://api.daily.dev/r/Xup0rhKMJ","embedUrl":"https://www.youtube.com/embed/y7r-UYR1Lz0"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Microsoft Developer","item":"https://daily.dev/sources/microsoftdeveloper"},{"@type":"ListItem","position":3,"name":"WebTransport Headers, Zstd WAL Compression, and Copilot Studio Conversation Harness"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/webtransport-headers-zstd-wal-compression-and-copilot-studio-conversation-harness-xup0rhkmj#faq","mainEntity":[{"@type":"Question","name":"What storage engine does Microsoft Edge 156 use for IndexedDB now?","acceptedAnswer":{"@type":"Answer","text":"Microsoft Edge 156 switches IndexedDB stores to use SQLite instead of LevelDB under the hood, aiming to improve reliability and performance. 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