Added auto-advance (slideshow). In Settings > "Auto-advance", choose to advance only within a work or to continue to the next work after the last page. A control bar at the bottom of the viewer lets you play/pause, go back or forward, loop, and change the interval (2/3/4 seconds, or a custom 1-30 seconds in 0.5-second steps).

Fixed an issue where clicking the edges quickly with "Click the edges to navigate" (a double or triple click) selected the image or the empty margin and highlighted it in blue.

Rewrote the extension description so it tells what the extension does. In the settings page, when "Edge click area width" is set to Custom, the guide line on the left no longer breaks between the left/right and top/bottom sliders.

The viewer now also opens from the pixiv home page and from search results (each can be turned on or off). In the settings page, related options are grouped as parent and child, and the background darkness and the widths of the edge and actual-size click areas can be set with sliders. The edge click areas have separate left/right and top/bottom widths. Custom prefetch now goes up to 20 images. Network use is reduced: moving between artworks or changing settings no longer fetches the same data again. Fixed the viewer closing when an edge was clicked while loading, ugoira shrinking when playback starts, and more.

Added an "Advanced" tab to the settings page, where you can choose the sidebar width, background darkness, the size of the edge-click areas, how many comments to load at once and more from preset steps. Prefetch has a new "Custom" choice for 1 to 10 images each way. Ugoira now have a seek bar and a playback speed menu (0.25x to 2x). With edge-click navigation, edges where you cannot move further show a "not allowed" cursor.

You can now click near the edges of the viewer to turn pages or switch works (setting "Click the edges to navigate", off by default). When the sidebar is hidden, a "Artwork page" link appears next to the close button, and on narrow windows the sidebar can be opened with the button at the top right. Fixed the viewer sometimes closing when you click the ugoira play button, and clicking below a commenter's icon opening their page.

Opening and moving between works is faster. Ugoira starts playing before it finishes downloading, and the original-size view shows the already-loaded standard image first. Added the option "Also preload the adjacent work" (off by default).

Added Korean, Simplified Chinese and Traditional Chinese. When pixiv is displayed in one of these languages, the viewer and the settings screen follow it.