Changed

The popup no longer waits for everything. It opens as soon as the article summary arrives (one request instead of up to five in sequence). Quick facts, the image carousel, and the pronunciation button stream into the open popup a moment later with their usual entrance animations.
The lookup cache survives service worker restarts, so repeating a selection stays instant even after the extension has been idle.
Snappier reaction: the selection debounce dropped from 250ms to 180ms.
In practice: lookups that could take several seconds (Large size and non-English languages were the slowest) now show the popup in well under a second on a normal connection, with the extras filling in right behind.

The popup now follows the screen while scrolling when it is pinned

New

Keyboard shortcut: press Ctrl+Shift+L (Cmd+Shift+L on Mac) to preview the current selection on demand. Works even in Alt+select mode, on disabled sites, and inside text fields, since pressing it is an unambiguous request.
Browse inside the popup: clicking a quick-fact link (a country, an occupation, a person) opens that article right in the popup, and a back button walks you home again. Disambiguation picks join the same history.
Pin and drag: pin the popup to keep it open while you scroll and read (Esc still closes), and drag it anywhere with the grip in the footer.
Copy citation: one click copies the title and Wikipedia link.
Pronunciation: articles with audio on Wikidata get a speaker button next to the title (Large size).
Localized facts: quick-fact values now appear in your chosen language when available, with English fallback.
Preview counter: the toolbar popup shows how many articles you have previewed (stored only on your device).
Fixed

Lookups from different tabs no longer cancel each other
A failed image load no longer leaves the carousel frame blank
The popup repositions itself once a tall first image arrives
Toolbar popup rows are keyboard accessible, and real errors are no longer reported as "no match"
Website quick-fact links are restricted to plain http(s) URLs
Short ordinary articles can no longer be mistaken for link-list pages
Disabled-site entries pasted with a port now match
All Wikimedia API requests identify the client with an Api-User-Agent header

What's new in 1.3.1

Images are now always shown whole. The popup no longer crops article images to a square — every image keeps its natural aspect ratio, and very tall portraits letterbox gracefully instead of losing heads or details.

A softer, more polished card. Corner radius doubled and the drop shadow deepened, so the popup lifts more elegantly off the page.

Dark Reader compatibility. If you use the Dark Reader extension, it used to repaint the popup into an unreadable light-on-light card. WikiLens now protects its own colors, so the popup renders exactly as themed (light, dark, or auto) while Dark Reader keeps darkening the page around it.