Calibre Portable full changelog

New features:
Read aloud: Add the high quality Kokoro voices, which sound much more natural than the Piper voices, especially for English
To use them, select the Piper backend in the Read aloud configuration and choose one of the Kokoro voices. The voice will be automatically downloaded the first time it is used.
News download: Support for downloading news from websites that block automated access by using the camoufox browser
Some news sites, such as The New York Times, The Economist and The Atlantic, block all lighter weight ways of fetching their pages. Recipes for these sites now use the camoufox browser, which is automatically downloaded the first time such a recipe is run. Recipe authors can use it by setting browser_type = 'camoufox' in their recipes.
PDF Input: Support for right-to-left text and better handling of multi-column pages
Add support for reading images in the AVIF format
Tag browser: A new option to sort hierarchical tags that have only children but no actual books as folders, before all other tags at their level
Edit book: Check book: Allow skipping of problems of a particular type
Edit book: ToC View: Indicate what ToC entries, if any, are in the file being currently edited
Edit book: Check book: When auto fixing invalid ids also update CSS selectors
E-book viewer: Add an option to display the immediate parent ToC section in headers/footers
E-book viewer: Allow e-books to store up to 1MB of data persistently
E-book viewer: Print to PDF: Allow specifying margins in metric units
Tag mapper and HTML/CSS transform rules: Add the ability to search the rules
Allow removing individual entries from the search history dropdown
Add a button to Preferences->Look & feel->Main interface to reset the main window layout
Create your own Adventure: Allow exporting and importing saved games
Speed up various operations on large libraries, such as startup, deleting many books, sorting by series, searching and refreshing the Tag browser
Kobo driver: Add suppor