This release, the final one of 2025, contains improvements for accessibility, font conversion, image conversion, performance, text selection and the viewer.

Changes since v5.4.449

• Bump the stable version in pdfjs.config by @timvandermeij in #20469
• [Editor] Pointer type initialization only when the user changes the mode by @legraina in #20226
• Update dependencies and translations to the most recent versions by @timvandermeij in #20470
• Aria-hide the text content part of a MathML formula (bug 1998046) by @calixteman in #20471
• Inject the text from the text layer in the MathML tags when they're in the struct tree (bug 1998046) by @calixteman in #20472
• Add a menu class in order to be used in the new UI for the merge feature by @calixteman in #20483
• Add some callbacks when resizing a sidebar by @calixteman in #20474
• Use HTMLElement.scrollIntoView when showing a thumbnail by @calixteman in #20476
• Extend getGlyphMapForStandardFonts with some Russian entries (issue 20453) by @xiaobai2017666 in #20454
• Add a new linting task in order to detect unused/unknown css variables in the Firefox build by @calixteman in #20485
• Add .vscode to .gitignore by @calixteman in #20490
• Encode FontPath data into an ArrayBuffer by @ryzokuken in #20346
• Move the css for tree object in its own file by @calixteman in #20493
• Use only one resize observer in the the sidebar by @calixteman in #20494
• Fix infinite loop in JBIG2 decoder with >4 referred-to segments by @Gaurang-5 in #20440
• Move text layer scaling logic to CSS by @nicolo-ribaudo in #20491
• Improves text rendering performance by skipping unnecessary pattern calculations by @AtiX in #20499
• Simplify positioning of elements inside markedContent by @nicolo-ribaudo in #20492
• Fix #20420: Prevent double decoding of file URL parameter by @Uzair-Ahmed-Shah in #20482
• Fix the position of the checkmark when the menu is displayed in RTL by @calixteman in #20500
• Fix some css in the tree view by @calixteman in #20508
• Change the sidebar for a views manager by @calixteman in #20495
• Bump actions/upload-artifact from 5 to 6 by @dependabot[bot] in #20507
• Run the CI tests in Node.js version 25 too by @timvandermeij in #20502
• Fix unit tests in adding a comma in the JSON for imports by @calixteman in #20517
• Update dependencies and translations to the most recent versions by @timvandermeij in #20501
• Escape punctuation signs in search query by @calixteman in #20518
• Avoid exception when trying to render some glyphs contours by @calixteman in #20514
• Simplify regex escaping by @calixteman in #20524
• Dont' throw when adding page labels in thumbnails by @calixteman in #20521
• Fix the encoding for some missing chinese fonts by @calixteman in #20526
• Remove some files from talos tests because they aren't available on webarchive by @calixteman in #20527
• Avoid pattern creation with some basic gradients by @calixteman in #20525
• Introduce a helper function to draw a line in the ink editor integration tests by @timvandermeij in #20519
• Add CLAUDE.md generated with claude code by @calixteman in #20522
• Avoid to have a mail link with string having the format ddd@d.dddd by @calixteman in #20531
• Remove undefStack stuff in the cff parser by @calixteman in #20537
• Fix the loca table length when there is enough space for it by @calixteman in #20538
• Use CIDToGIDMap when the font is a type 2 with an OpenType font by @calixteman in #20535