Part of Chrome new implementation of the built-in PDF document viewer interface. The interface is notable for the removal of all settings to the top panel. If earlier only the file name, page information, rotate, print and save buttons were displayed in the top panel, now the contents of the side panel, which included controls for scaling and placing the document to fit the page, have been transferred to it. the ability to save edited PDF forms, and double page view.
To enable new features, the flags "chrome://flags#pdf-viewer-update", "chrome://flags/#pdf-form-save" and "chrome://flags/#pdf-two-up-view" are proposed. ".
Of the changes in Chrome, you can also note default image format support (AV1 Image Format), which uses intra-frame compression techniques from the AV1 video encoding format. The container for distributing compressed data in AVIF is completely similar to HEIF. AVIF supports both images in HDR (High Dynamic Range) and Wide-gamut color space, as well as in standard dynamic range (SDR). Firefox added experimental support for AVIF in the Firefox 77 release (enabled via image.avif.enabled in about:config).
Previously, Chrome promoted the image format , which Google allows you to reduce the size of image files by 25%-34% while maintaining quality at the level of the JPEG format. Alternative tests that WebP is not as efficient as we would like - if we compare it not with the reference cjpeg encoder from the JPEG Group, but using a more efficient encoder , then the benefit of WebP is felt only at low resolutions (500px), which are most commonly used on the Web. At 1000px the result is almost the same, and at 1500px WebP even lags behind MozJPEG. AVIF significantly outperforms MozJPEG, cjpeg and WebP in the same tests, so it is considered by browser manufacturers as a more promising format.
Source: opennet.ru
