PDF.js 6.0 is a major release that contains a number of API changes, features and bugfixes.

The complete list of changes in this release is shown below. If you're upgrading to PDF.js 6.0 we recommend checking the changes prefixed with [api-minor] and [api-major] since those might require updates to your code.

Changes since v5.7.284

• Bump the stable version in pdfjs.config by @timvandermeij in #21177
• Improve the performances of "gulp lint" by @calixteman in #21169
• Convert Catalog.prototype.getPageIndex to an asynchronous method by @Snuffleupagus in #21181
• Split integration tests into per-browser jobs by @calixteman in #21179
• Bump actions/setup-node from 6.3.0 to 6.4.0 by @dependabot[bot] in #21182
• Split the unit/font tests into per-browser jobs by @timvandermeij in #21183
• Send 'Terminate' to the worker when destroy races the load-time handshake (bug 1942304) by @calixteman in #21175
• Collect worker-side coverage for browser unit tests by @calixteman in #21178
• Fix HCM colors for the views-manager massive unselect button (bug 2035551) by @calixteman in #21187
• Use Istanbul instrumentation for unittestcli code coverage by @calixteman in #21189
• Add an abstract readBlock method in the DecodeStream class by @Snuffleupagus in #21190
• Move unittestcli coverage collection to ci.yml by @timvandermeij in #21191
• Fix the intermittent test failure 'performs a search in a text containing some Hangul syllables' by @calixteman in #21193
• Slighty improve codecov stuff in gh actions by @calixteman in #21194
• Improve error handling in the PDFFindController.prototype.#extractText method by @Snuffleupagus in #21197
• Wait for the first page to be ready in the reorganize pages integration tests by @timvandermeij in #21186
• Simplify the nextChunk handling in the DecryptStream class by @Snuffleupagus in #21198
• Shorten how intersectors are added to the grid in the Intersector constructor by @Snuffleupagus in #21200
• Optimize memory usage in the unit tests by @timvandermeij in #21195
• Remove obsolete pdfBug: true flag in the image caching unit test by @timvandermeij in #21203
• Add some colors in the logs in order to easily see failures and add a summary of the failures at the end by @calixteman in #21192
• Improve performance of the "caches image resources at the document/page level as expected (issue 11878)" unit-test by @Snuffleupagus in #21206
• Use a reduced test-case for the "caches image resources at the document/page level as expected (issue 11878)" unit-test by @Snuffleupagus in #21207
• Fix free highlight on pages without images (bug 2035530) by @calixteman in #21196
• l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21208
• [api-major] Update the minimum supported browsers, and remove no longer needed polyfills by @Snuffleupagus in #21152
• [api-minor] Use the ImageDecoder by default on Chrome by @calixteman in #20961
• Bump library version to 6.0 by @Snuffleupagus in #21209
• Optimize runtime of the find controller unit tests by @timvandermeij in #21210
• Don't provide unused /DecodeParms when initializing JpxStream by @Snuffleupagus in #21211
• Remove the CompilerOutput.prototype.finalData getter, and a few other font improvements (PR 21053 follow-up) by @Snuffleupagus in #21214
• Replace a loop with TypedArray.prototype.set() in the compileFDSelect method by @Snuffleupagus in #21215
• Remove the unused raw field from the CFFCharset class by @Snuffleupagus in #21216
• Replace TrueTypeTableBuilder and CompilerOutput with a single class by @Snuffleupagus in #21220
• Add an abstract WasmImage class, that JBig2CCITTFaxImage and JpxImage inherit from by @Snuffleupagus in #21225
• Clear the text layer container when cancelling rendering by @calixteman in #21219
• Run unit-tests in Node.js version 26 by @Snuffleupagus in #21224
• A couple of small tweaks of the getPdfFilenameFromUrl helper by @Snuffleupagus in #21222
• Include the external/ folder in the coverage report for gulp unittestcli by @Snuffleupagus in #21226
• Tweak the WasmImage implementation a little bit (PR 21225 follow-up) by @Snuffleupagus in #21229
• Bump ip-address from 10.1.0 to 10.2.0 by @dependabot[bot] in #21232
• Make sure the focus moves on the first page of the added pdf after a merge (bug 2034827) by @calixteman in #21223
• Place new annotations on the correct page when extracting pages (bug 2027682) by @calixteman in #21228
• Improve soft mask composition performance (bug 2033095) by @calixteman in #21235
• Simplify '#getFilteredPageIndices' and '#resolveInsertAfterIndices' by @calixteman in #21231
• l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21237
• Bump fast-xml-builder from 1.1.5 to 1.2.0 by @dependabot[bot] in #21243
• Bump fast-uri from 3.1.0 to 3.1.2 by @dependabot[bot] in #21244
• Bump @babel/plugin-transform-modules-systemjs from 7.29.0 to 7.29.4 by @dependabot[bot] in #21248
• Make the PDFDataRangeTransport streaming unit-tests faster by @Snuffleupagus in #21238
• Use Uint8Array.fromHex in test/unit/crypto_spec.js by @Snuffleupagus in #21246
• Fall back to pixel-buffer SMask filtering when ctx.filter is unavailable by @calixteman in #21236
• [api-major] Remove support for calling getDocument without a parameter object, and remove the PDFDocumentProxy.prototype.destroy method by @Snuffleupagus in #21245
• Support providing a filename unconditionally, when passing binary data to PDFViewerApplication.open by @Snuffleupagus in #21249
• perf: Avoid multi-second getDestinations stalls for PDFs with many named destinations by @saripovdenis in #21213
• Avoid cycles when getting operator list in patterns by @calixteman in #21230
• Move the getModificationDate helper function into src/core/core_utils.js by @Snuffleupagus in #21258
• Update the deepCompare helper function to handle Refs and Names correctly by @Snuffleupagus in #21257
• Render knockout transparency groups by @calixteman in #21242
• Update dependencies to the most recent versions by @timvandermeij in #21256
• Bump github/codeql-action from 4.35.2 to 4.35.3 by @dependabot[bot] in #21265
• Use FeatureTest.isCanvasFilterSupported in _bakeSMaskCanvas by @calixteman in #21264
• [Editor] Avoid "generating" the l10n-ids used for the a11yAlert by @Snuffleupagus in #21263
• Fix nested non-isolated groups in knockout rendering by @calixteman in #21262
• Remove the executable bit from test PDF files by @timvandermeij in #21267
• Avoid bundling DOM-related code in the built pdf.worker.mjs file by @Snuffleupagus in #21269
• Collect coverage information for the integration tests by @timvandermeij in #21173
• Add a lint-chmod task to catch stray executable bits by @calixteman in #21268
• Add a simple API unit-test for /BrotliDecode by @Snuffleupagus in #21271
• Enable Codecov flag carryforward for accurate coverage badge by @calixteman in #21274
• Ensure TextLayer hiddenCanvasElement is layout-neutral by default by @RolandWArnold in #21218
• l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21278
• Move the stringToPDFString helper function to the worker-thread by @Snuffleupagus in #21279
• Remove the Util.domMatrixToTransform method by @Snuffleupagus in #21281
• Clear the full SMask scratch canvas in compose() by @calixteman in #21277
• [api-minor] Move the getXfaPageViewport helper into the XfaLayer class by @Snuffleupagus in #21283
• Move the SVG_NS definition into src/shared/util.js by @Snuffleupagus in #21284
• Add a couple of very basic ColorConverters unit-tests by @Snuffleupagus in #21286
• Remove the unused Outline._normalizePagePoint method by @Snuffleupagus in #21287
• Add an integration-test for the page-name fuzzy matching in the PDFDocumentProperties dialog by @Snuffleupagus in #21289
• Add an integration-test for documents without contentLength available in the PDFDocumentProperties dialog by @Snuffleupagus in #21291
• Enable the must check that an existing highlight is ignored on hovering integration test on Windows by @timvandermeij in #21288
• Optimize runtime and memory usage of the integration tests by @timvandermeij in #21275
• Recover CFF private dict defaults zeroed by Ghostscript by @calixteman in #21290
• Add a Content-Security-Policy to pdf.js' viewer.html (bug 1960363) by @calixteman in #21261
• Move the Util.scaleMinMax helper into src/display/canvas_dependency_tracker.js by @Snuffleupagus in #21294
• Add more integration-tests, with multi-page documents, for the PDFDocumentProperties dialog by @Snuffleupagus in #21295
• Introduce integration tests for the presentation mode functionality by @timvandermeij in #21292
• Disable hardware acceleration for Chrome tests by @timvandermeij in #21299
• Make text selection more visible (bug 1879559) by @wooorm in #20981
• Fix 'Select all' after #20981 by @calixteman in #21309
• Don't use "internal" EventBus methods in the integration-tests by @Snuffleupagus in #21305
• Bump actions/create-github-app-token from 3.1.1 to 3.2.0 by @dependabot[bot] in #21301
• Bump github/codeql-action from 4.35.3 to 4.35.4 by @dependabot[bot] in #21302
• Extend unit-test coverage for the getPdfFilenameFromUrl helper function by @Snuffleupagus in #21311
• Add basic integration-tests for the PdfTextExtractor class by @Snuffleupagus in #21304
• Allow merging a PDF by dropping it onto the thumbnail viewer by @calixteman in #21306
• Sanitize glyf composite cycles, OS/2 length and maxp version mismatches by @calixteman in #21300
• l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21316
• Use the CFF program directly for CID fonts wrapped in OpenType FontFile3 by @calixteman in #20542
• Shorten the fontFile lookup a tiny bit by @Snuffleupagus in #21322
• Shorten the XfaLayerBuilder.prototype.render method by @Snuffleupagus in #21317
• Use Uint8Array.fromBase64 in the test/integration/highlight_editor_spec.mjs file by @Snuffleupagus in #21323
• Simplify how the character BBox is scaled in src/display/canvas_dependency_tracker.js by @Snuffleupagus in #21324
• Add support for Optional Content in the AnnotationLayer (issue 20433) by @Snuffleupagus in #21313
• Fix the XRefWrapper implementation, in the src/core/editor/pdf_editor.js file by @Snuffleupagus in #21319
• Keep the first /Subrs and /CharStrings block by @calixteman in #21315
• Substitute a system font when an embedded CFF is truncated by @calixteman in #21320
• Update dependencies to the most recent versions by @timvandermeij in #21328
• Recover CFF FontBBox with negative coordinates encoded as unsigned 16-bit by @calixteman in #21314
• Force the text selection color to be in light mode by @calixteman in #21329
• Prevent inherited spacing from affecting text layer by @danyalahmed1995 in #21321
• Avoid a temporary variable and return results directly in a couple of functions by @Snuffleupagus in #21332
• Load the predefined CMap for composite fonts that omit the FontDescriptor by @calixteman in #21331
• Enable 'eslint-plugin-regexp' and fix existing findings by @calixteman in #21330
• Recover the browser session on test timeout to keep running subsequent tests by @calixteman in #21333
• Run unit-tests and integration-tests when the external/builder/ folder is changed by @Snuffleupagus in #21340
• Remove unused variables with the Babel plugin by @nicolo-ribaudo in #21339
• Revert "Remove unused variables with the Babel plugin" by @Snuffleupagus in #21342
• Add support for encrypted attachments by @wooorm in #21234
• Bump github/codeql-action from 4.35.4 to 4.35.5 by @dependabot[bot] in #21344
• Bump codecov/codecov-action from 6.0.0 to 6.0.1 by @dependabot[bot] in #21345
• Use a black backdrop for Luminosity SMasks when /BC is missing by @calixteman in #21348
• Allow merging several PDFs at once via the picker or drag-and-drop by @calixteman in #21335
• Parse CID-keyed Type 1 fonts instead of falling back to a system font by @calixteman in #21336
• l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21354
• Allow inserting an image as a new page when editing a PDF (bug 2032967) by @calixteman in #21334
• Clamp out-of-range BlueScale to Adobe's valid window by @calixteman in #21343
• Add a pref to postMessage when mozPrintCallback has completed (bug 2036265) by @calixteman in #21308
• Fix missing non-zero exit code for failure cases in test.mjs by @timvandermeij in #21357
• Upgrade Puppeteer to version 25.1.0 by @timvandermeij in #21285
• Re-factor how "internal" EventBus listeners are handled in the viewer by @Snuffleupagus in #21355