• Loading: fix loading revisit records that may have incorrect content-length (via wabac.js)
  • Fidelity: improved fuzzy matching rules (via wabac.js)
  • Misc: github issue templates, fix typo in CORS config docs
  • Dependencies: Update to wabac.js 2.16.13


  • Loading: Ensure default index.html is served when not in embed mode, don’t add ‘?serveIndex=1’ for app itself


  • Loading: Fixes embed ‘Purge Cache + Reload’, ensure ‘?serveIndex=1’ is always set on all service worker loading


  • Loading: Use default html index, avoid custom html injection (via wabac.js 2.16.12)
  • Dependencies: Switch to wabac.js 2.16.12


  • Regression fix: Fix embed loading from different domain being broken in 1.8.9
  • Dependencies: Switch to wabac.js 2.16.11


  • Fidelity: Ignore self-redirects when loading (via wabac.js)
  • Fidelity: Don’t rewrite ‘location = 0’ as window.location (via wabac.js)
  • API: Add /api/c/[coll]/ts/?url=… API for returning array for timestamps for given URL (via wabac.js)
  • Source/Build: simplify build, use sw.js directly from wabac.js release instead of rebuilding (except when developing)
  • Dependencies: Switch to wabac.js 2.16.10


  • Source/Build: Format src files with Prettier, add pre-commit check, fix errors in HTML
  • Fidelity: Fix regression from 2.16.8 for rewriting JSON in ‘script’ tags (via wabac.js 2.16.9)
  • UI: Better handling of Multi WACZ collections, list collection name, description and files on info tab
  • Dependencies: Switch to wabac.js 2.16.9


  • UI: Fix info tab overflow being hidden
  • Loading: Improved support for live proxy via wabac.js 2.16.7
  • Fidelity: Improved support for document.write() overrides with wabac.js 2.16.7
  • Fidelity: Improved relative URL rewriting via wabac.js 2.16.8
  • Dependencies: Switch to wabac.js 2.16.8


  • Loading: Fix improved handling of multi-wacz collections (via wabac.js 2.16.6)
  • Loading: Allow embedded video/audio to play inline instead of being downloaded (via wabac.js 2.16.6)
  • Fidelity: Add missing ruffle.js files to fix ruffle
  • UI: Add ‘Observer Public Key’ field to Info tab
  • Embed UI: Move download about technical info on ‘receipts’ dropdown
  • Dependencies: Switch to wabac.js 2.16.6


  • Loading: Improved handling of multi-wacz collections, support loading URLs cross-WACZ to support patching
  • Dependencies: Switch to wabac.js 2.16.5


  • Fidelity: improved replay of pages with top-level ‘let’ and ‘const’ globals via script parsing (via wabac.js)
  • Dependencies: Switch to wabac.js 2.16.4


  • Loading: fix ‘Show Non-Seed Pages’ for Multi WACZ collections and after reload
  • Dependencies: Switch to wabac.js 2.16.3


  • Loading: fix redirect loop on 404s (via wabac.js 2.16.2)
  • Misc: additional check before autoupdate, update build deps to support Node 20


  • Loading: Resolve sourceUrl to absolute url when computing default id
  • Loading: Disable ruffle on embeds by default, can enable with ‘useruffle’, enable on standalone by default, can disable with ‘skipruffle’ attr
  • Dependencies: Switch to ruffle 2023-05-13 due to issues in later versions


  • UI: Add ‘Show All Pages’ option to show non-seed pages that are previously only available via search
  • Embeds: add ‘swName’ option to allow customizing ‘sw.js’ to a different filename
  • Dependencies: Update to wabac.js 2.16.1 – varioues loading improvements related to surt
  • Dependencies: Update to electron 25.5.1, ruffle 2023-06-14


  • UI: Loading: support URLs that have query/hashes after extension
  • Dependencies: Update to wabac.js 2.16.0 – improved support for Multi WACZ files


  • Fidelity: Support dynamic ‘import()’ in non-module JS (via wabac.js 2.15.4)
  • Fidelity: Fix dynamic iframes (via document.write / srcdoc) that fallthrough (via wombat 3.5.1, wabac.js 2.15.5)
  • Fidelity: Fix loading WARCs with duplicate revisit records overriding non-revisit records (via wabac.js 2.15.5)
  • UI: Fix sidebar background color in fullscreen mode to default to white. (thanks to @matteocargnelutti)
  • UI: Support drag-and-drop loading of archives (thanks to @curtgrimes)
  • UI: Show total number of pages on pages list (thanks to @matteocargnelutti)
  • Dependencies: Update to wabac.js 2.15.5, wombat 3.5.1


  • Fidelity: Improved replay via unrewriting fixes of style urls, request/response urls (via wabac.js 2.15.3)
  • Embeds: Support updating auth headers if custom headers provided in embed ‘config’
  • Dependencies: Update to wabac.js 2.15.3, wombat 3.4.6, Electron 23.1.1


  • Fidelity: Improved replay of facebook/instagram pages (via wabac.js 2.15.1)
  • Loading: Fix issue with loading certain WACZ files (incorrect SURT detection fixed, via wabac.js 2.15.2)
  • Dependencies: Update to wabac.js 2.15.2


  • Loading: Support loading URLs without extension (including blob: urls), automated type detection of WACZ, WARC, compressed and uncompressed (via wabac.js)
  • Fidelity: Improved handling of ESM modules, cookies, Vimeo videos (via wabac.js)
  • Dependencies: Update to wabac.js 2.15.0, wombat 3.4.3


  • Verification: Change site used for cert verification to


  • Fidelity: Various fidelity improvements via new wabac.js / wombat
  • Dependencies: Update to wabac.js 2.14.0, wombat 3.4.2, warcio 2.0.1


  • Electron App: simplified IPFS loading in app, can connect to default IPFS Desktop or IPFS in Brave automatically
  • Electron App: clean up unused code, old ipfs loading paths from app, streamlined file loading
  • Dependencies: Update to wabac.js 2.13.15, wombat 3.3.13, auto-js-ipfs 2.1.0, electron 22.0


  • Bug Fix: Fix loading issue on first use due to injected script check (via wabac 2.13.14)
  • Indexing: Fix video loading, don’t index partial 206 in all loading paths (via wabac 2.13.13)
  • Dependencies: Update to wabac.js 2.13.14


  • Bug Fix: Ensure Flash (via ruffle.js) loading is working (via wabac.js 2.13.11)
  • Bug Fix: Fix occasional issue in (viw wombat)
  • Dependencies: Update wabac.js to 2.13.12, wombat 3.3.12, update Ruffle to 2022-11-25 release


  • Library: Readd assets dir to package (needed for


  • Embed: Support loading entire WACZ in embed via load='eager' flag
  • Dependencies: update to wabac.js 2.13.10 for eager loading support
  • Dependencies: update to electron 21.3.1
  • Library: Remove assets dir from npm package


  • Fidelity: Misc fidelity improvements via latest wombat + wabac.js
  • Dependecies: wabac.js 2.13.8, wombat 3.3.11, auto-js-ipfs 1.5.1
  • Loading: Fix occasional loading issues with multiple embeds loading on the same page


  • Fidelity: Fix replay of TikTok
  • Dependencies: Update to wabac.js 2.13.4
  • Docs: Update to embedding guide to mention new embed modes


  • Electron App: Fix electron app not loading preload.js, regression in 1.7.0
  • Fidelity: Fixed embedded tweet video issue (via wabac.js)
  • Fidelity: rewrite target=”new” to not open new window
  • Dependencies: Update to wabac.js 2.13.3


  • UI: Support showing WACZ verification stats on info tab, showing hashes verified, observer domain, (or public key and creation software), and certificate fingerprint, and WACZ package digest
  • Embed UI: Add replay-with-info embed mode which provides an information dropdown above replay, including verification info and link to download.
  • Embed UI: Add hideOffscreen attribute to enable hiding embed when offscreen (previously always enabled).
  • Embeds: add `newWindowBase” for configuring base replay for loading pages in new windows (default: or current page with deep links)
  • Embeds: Set noCache and noWebWorker automatically if needed based on browser features (eg. Safari)
  • Errors: More error messages, such as due to cross-origin iframes lacking service-worker support and Firefox-specific messages
  • Embeds: Rename ‘noSandbox’ -> ‘sandbox’, don’t make default to support window target reuse
  • Fidelity/Embeds: Redirect new windows from links / to existing replay frame (only possible w/o ‘sandbox’).
  • Embeds: Add ‘requireSubdomainIframe’ embed attribute to only allow embed if loaded from a cross-origin / subdomain iframe.
  • UI: improved formatting on 404 not found page.
  • Loading: Fix IPFS loading, use auto-js-ipfs to load from an IPFS gateway or existing local instance (don’t run local node for now)
  • Loading: App: Load ‘not found’ URLs from error page using default browser
  • Dependencies: update to wabac.js 2.13.2 to support verification, latest wombat (3.3.9)


  • Loading: Don’t ignore hashtag, eg. #.wacz to specify file type when loading (via wabac.js)
  • Documentation: Update embedding guide to mention self-hosting of embed scripts
  • Embed: Use display: block for embed to avoid extra scrollbars
  • Fidelity: Various replay improvements via latest wabac.js (fix module script rewriting, more twitter video rewriting fidelity, ignore invalid link headers)
  • Dependencies: update to wabac.js 2.12.5


  • Embeds: Support noCache attribute in <replay-web-page> to disable cacheing any HTTP response payloads
  • Dependencies: update to wabac.js 2.12.3


  • Loading: replay fixes for WARCs with revisit records (via wabac.js)
  • Fidelity: fix for rewriting of some JS incorrectly treated as a module (via wabac.js)
  • Loading: fix loading ipfs:// urls (via wabac.js)
  • Dependencies: update to wabac.js 2.12.2


  • Library: additional fixes, make ‘purge cache’ configurable
  • Library: Add index.html to npm bundle
  • UI: Fix date padding


  • Embed/Library: Make embedding more extensable for use as a library (for extensions)
  • UI: Unified service worker error messaging for regular and embed mode, show correct error when loaded over http.
  • Dependencies: update ruffle to 2022-07-02


  • Embeds: Support embedding without using webworker with ‘noWebWorker’ attrib added to <replay-web-page>
  • Fidelity: improved replay of pages that use eval() in global scope (via wabac.js)
  • Fidelity: improved replay of twitter videos archived via browsertrix-crawler/pywb (via wabac.js)
  • Loading: Support for multi-WACZ json, with search across all WACZ files (via wabac.js)
  • Loading: Support for loading from non-HTTP URLs (via wabac.js) in browsers that support custom fetch
  • UI: Support for entering ssb://<hash> URLs for use with browsers that support custom fetch
  • Dependencies: update to wabac.js 2.12.0, update to electron 19.0.4


  • Loading: fix url lookup when no ‘=’ in query arg, optimize loading compressed index (only load 3 blocks), via (wabac.js)
  • Loading: fix url lookup api calls
  • Loading: new live proxy support, per-hostname config, combined with wacz loading or main ‘proxy:’ config
  • Loading: fix loading for very large wacz files (via wabac.js)
  • Dependencies: update to wabac.js 2.11.1


  • Fidelity: Encoding fix for non-ascii links, optimizations for utf-8 parsing (via wabac.js 2.10.3)
  • Dependencies: update to wabac.js 2.10.3


  • Dependencies: update to wabac.js 2.10.2
  • Loading: for experimental multi-wacz input, disable periodic reload for now


  • Loading: fix hosted replay via subpath when opening in new tab (#82)
  • Loading: fix multi-wacz support in wabac.js
  • Dependencies: update to wabac.js 2.10.1


  • Dependencies: update to wabac.js 2.10.0 and wombat 3.3.6
  • Dependencies: update to electron 16.0.6 (chromium 96)
  • Dependencies: update ruffle to latest nightly (2022-01-08)
  • Dependencies: update lit to 2.1.1


  • Fidelity: Fix assignment to local location causing invalid redirect (via wombat 3.3.5)
  • Loading: Optimized loading for larger WARCs (via warcio 1.5.0)
  • Loading: Show number of WARC records loaded (via wabac.js 2.10.0-beta.0)
  • Loading: Use separate web worker for loading, then remove for possible faster loading


  • Fidelity: Only wrap JS globals if necessary (via wabac.js 2.9.5)
  • UI: Add download option from collection info and dropdown menu to download web archives from http.
  • Dependencies: update to wabac.js 2.9.5
  • Dependencies: update to electron 15.3.0 (chromium 94)
  • Dependencies: update ruffle to latest nightly (2021-10-25)


  • Fidelity: Faster rewriting of large JS files
  • Fidelity: Fixes for twitter video replay
  • Loading: Fix IPFS loading of WARCs
  • Fidelity: fix replay of .php files being treated as static files (via wabac.js 2.9.4)
  • Fidelity: Fix wombat.js build to avoid adding ‘esModule’ to window (via wabac.js 2.9.4)
  • Dependencies: update to wabac.js 2.9.4


  • Fidelity: fix for some eval replay (via wombat), include http->https check for wacz sources
  • Dependencies: update to webpack 5 build, wabac.js 2.9.2, wombat 3.3.4
  • Search: update to latest flexsearch, faster/improved searching


  • App: IPFS: Configure js-ipfs repo directory to be in existing profile directory
  • Loading: IPFS: Fix IPFS support for OSX M1 builds by including leveldown prebuilds
  • Dependencies: update to wabac.js 2.9.1, wombat 3.3.3


  • Library usage: Simplfy download options in editable mode, add warc/1.0 download opt (for
  • Library usage: Allow custom service worker init path on app init (or none)
  • Library usage: Ensure page title reflects current app
  • UI: Refresh UI after half second while waiting for service worker to load, instead of every 5.


  • Update to wabac.js 2.9.0-beta.1, fidelity and loading improvements, smaller size (includes indexeddb data migration)
  • Update to electron 14 (latest beta), Chromium 93
  • Update to Universal builds for OS X.
  • Add Ruffle, use for Flash loading, both in hosted and electron app versions.
  • Embeds: Better error message for when service worker could not be loaded.


  • Loading: HAR file loading: Add messages when HAR file content is missing, don’t filter out empty urls (via wabac.js)
  • Loading: Fix “null” added on Not Found error page when there is no hashtag.
  • Fidelity: Disable post-to-GET conversion (no longer need in latest Chrome!)
  • Rewriting: Optimized HTML rewrite for large HTML and disable rewriting if HTML >5MB, improved eval() rewriting, more lenient JSONP matching (via wabac 2.8.0)
  • Fidelity: Fix possible skipping of URLs from WACZ that contain’www.’ in the middle of URL due to incorrect surt canonicalization (wabac.js 2.8.0)
  • Dependencies: bump to wabac.js 2.8.0, wombat to 3.3.1


  • Fidelity: Better WS override that avoids network connection attempts, fixes to pixel ratio override (via wombat.js)
  • Fidelity: Better SW override, add missing members that caused errors (via wombat.js)
  • Fidelity: Better Storage overrides, more compatible with native Storage APIs (via wombat.js)
  • Fidelity: disable DASH loading for IG videos (via wombat.js)
  • Loading: Include hashtag URL on not found pages (via wabac.js)
  • Dependencies: bump to wabac.js 2.7.10, wombat 3.2.2


  • Loading: Fix IPFS loading (fixed in wabac.js 2.7.8)
  • Fidelity: Support replaying localStorage/sessionStorage (if available)
  • Dependencies: bump to wabac.js 2.7.7, wombat 3.2.0


  • Loading: Fix loading from sources that don’t support range requests for HEAD, don’t send If-Range header (fixes in wabac.js 2.7.7)
  • Loading: Cleanup of any partial data loaded when collection load fails (from wabac.js)
  • Fidelity: Improved fidelity of certain sites that use eval() (from wabac.js)
  • Dependencies: bump to wabac.js 2.7.8, wombat 3.1.8, Electron 11.4.8


  • Loading: Various fixes to index loading for compessed WACZ index
  • Fidelity: Fix edge-case POST-to-get conversion - binary, empty and text/plain POST payloads now handled same way here (via wabac.js/warcio.js) as in other tools (pywb, cdxj-indexer)
  • Customization: Support for automated redirect to live page on not found (via embed options)
  • UI: Updated page not found message
  • UI: Fix location bar refresh not working with hashtag in URL
  • Dependencies: bump to wabac.js 2.7.4


  • Loading: Optimized loading WACZ in wabac.js (cache compressed index loading to avoid duplicate loading)
  • Loading: General fixes for WACZ loading (better format detection for newer and older versions, surt/non-surt indexes)
  • Update to latest wabac.js 2.7.3


  • Replay: Remove ‘download’ attribute from anchor tags, which doesn’t work in Chrome
  • Loading: Fix loading of full-text search index from older wacz


  • Embed: add ‘noSandbox’ option to not add sandbox to embed iframe
  • UI: Double-clicking on page entry causes reload.
  • UI: Fix location bar enter not always reloading specified URL
  • UI: Fix ‘Purge and Reload’ to reload current page
  • UI: Fix initial load not properly waiting for service worker
  • UI: Show ‘Loading Archives…’ on initial load, until first API response succeeds, instead of ‘No Archives’
  • Fidelity: Improved fuzzy matching for dynamic sites
  • Fidelity: Fix for multipart/form-data replay dropping certain query params
  • Fidelity: don’t remove spaces in css urls
  • Fidelity: Better detection of JSON responses served in response to ‘Accept: application/json’ but with wrong content-type
  • Docs: copy package.json to ‘data’ to allow access to version in UI, use latest fixed version in Collec
  • API: Switch from /wabac/ -> /w/ for replay paths, make path configurable
  • Extensibility: Make file chooser, collection list more extensible/stylable (for use with
  • Lint pass on code base
  • Dependencies: wabac 2.7.0, bulma 0.9.2, electron 11.4.3


  • Fidelity: fix encoding issues with UTF-8 encoded JS/CSS introduced in 1.3.13 (fixed via wabac 2.6.9)
  • Dependencies: wabac 2.6.9


  • Build: Fix incorrectly packaged npm package for 1.3.13, no other changes


  • Fidelity: fix encoding issues with non-UTF-8 encoded pages (wabac 2.6.8)
  • Fidelity: Better detection of JSONP, better rewriting of pages that use JSONP (wabac 2.6.7)
  • Dependencies: wabac 2.6.8


  • Loading: Fix bug with pages from WACZ files showing loading time, instead of actual timestamp.
  • Loading: WACZ loading works efficiently even when HEAD method is not supported.
  • Embeds: Resolve embed source to current page instead of to replayBase
  • Documentation: Updated Documentation with new images, troubleshooting and updated embed guide with reference and CORS help.
  • Dependencies: wabac 2.6.6


  • Loading: Fix regression in indexing of WARCs, including ignoring metadata records that were accidentally being indexed.
  • Loading: Add periodic ping when loading to avoid serviceworker shutdown in Firefox.
  • UI: On load failure, only add ‘try again’ option when reasonable.
  • Dependencies: wabac 2.6.5


  • Loading: Improved loading of video, especially on Safari, cache range requests via loading
  • Loading: Improved loading stability from service worker waiting for loading event to finish!
  • UI: Allow retry on loading errors even in non-embed mode.
  • Fidelity: Fixed replay of pages with Javascript modules.
  • Fidelity: Replay non-HTTP only cookies set via ‘Set-Cookie’ header, improving fidelity for sites that require cookies set this way.
  • Embed: Fix embed path to look for service worker in local ./replay/ directory by default, instead of root /replay/
  • Dependencies: wabac.js 2.6.4, wombat 3.1.2, warcio 1.4.2, Electron 11.3.0


  • Fidelity: Upgrade to wabac.js 2.6.1, wombat 3.1.1: improved POST request rewriting for multipart/form-data, Tableau dashboard fidelity
  • UI: editable mode: style fix on page delete spinner, don’t show editing options on sidebar


  • UI: Native files: Support asking permission when doing a full reload of a local file.
  • Library: Add WrModal UI element to simplify modal creation.
  • Library: UI: Add confirmation for page-deletion and multi page deletion when in editing mode (currently only used in
  • Fidelity: Fixes for youtube and vimeo replay fidelity
  • Dependencies: Update to wabac.js 2.5.6, wombat 3.0.4


  • Library: Add missing index.js to support loading ‘replaywebpage’ package


  • Switch back to Electron 11.2.0 / Chrome 87 to keep support for Flash plugin


  • Dependency update: Latest wabac.js / warcio / wombat
  • Electron App: Update to Chrome 88, fix for PDF rendering


  • Loading: Fix loading local files in App
  • Fidelity: Latest wabac.js
  • Autoupdate: Add initial support for auto-updating


  • UI: Component customization improvements, update to latest wabac.js
  • Loading: Improvements for IPFS loading, fix loading with hashtag #filename= in Electron app


  • UI: Show navbar on all pages, include breadcrumbs with collection title current page
  • UI: Condense frontpage UI slightly


  • Loading: Support updated WACZ Format (1.0.0) with latest wabac.js update
  • Loading: Archives loaded with via native file system can be reloaded after purge cache (chrome only)


  • UI: Condense navbar and location bar: add logo to location bar, condense button spacing, add about link to context menu
  • UI: Add collection info dropdown to be a separate tab instead
  • UI: Convert Terms into general About dialog
  • Loading: IPFS support! Load from ipfs:// URLs, eg. ipfs://hash/filename.wacz. Possible to specify extension for root with: ipfs://hash#filename=.wacz`
  • App: Electron App uses IPFS in node, proxies through file proxy.
  • Loading: Native File System (Chrome-only) support: Loading local files on Chrome uses FileHandle, which allows persistent reuse of files with permission
  • Loading: Optimize local file loading on all browsers: No more separate webworker, serviceworker caches entire blob into memory. Should fix Firefox loading issues streaming from blob.
  • Loading/UI: Revamp permissions UI to replace iframe instead of popup
  • UI: Favicon smoother update, better check for valid icon
  • UI: Purge Cache / Full Reload reloads current frame, not parent


  • Loading/UI: Fix Google Drive Loading/Reauthorization: Only trigger when reauth is needed. For rate-limit errors, attempt reloading more slowly (exponential backoff)
  • Loading: App supports opening WACZ, WARC and HAR files via double-clicking from OS and via command-line.


  • UI: Location bar fixes: Enter reloads same URL, Escape restores current URL, properly updated on navigation, Favicon displayed in location bar if available
  • UI: URL search defaults to all URL query, not HTML only query
  • Fidelity: Rewriting system overhaul, improved youtube rules, fuzzy matching improvements (using Levenshtein distance for query args)
  • Backend: Support for WARC record proxy, including kiwix/zim style separate headers and payload requests: headers loaded from <prefix>/H/<url>, payload from <prefix>/A/<url>


  • UI: Fix auto-loading of additional results on url search page when searching by mime type.
  • Fidelity: More fixes to replay of embedded “about:blank”, fix replay of embedded tweets in particular.
  • Fidelity: Various improvements to fuzzy matching (longer params weighed higher, numeric params weighed by difference, support for required params)


  • UI: Sort column is now remembered (for page lists, url resources and main collection lists)
  • UI: Highlighting enabled on URL search tab and ‘contains’ search fixed.
  • Fidelity: Improved replay for images from Wix sites
  • Fidelity: Fixed rewriting of web workers
  • Fidelity: Fixed rewriting of embedded “about:blank” iframes, which may not have replayed correctly.


  • Improved UI for embedding, allow viewing all search (story/pages/url) tabs
  • Sidebar support with all tabs available
  • Replay improvements, including better Safari support for video.
  • Embed options: embed="default" for full replay, embed="replayonly" for no location bar UI
  • a11y improvements for all UI elements (courtesy of @rebeccacremona)