--Reliability--
Fixed downloads silently failing on multi-image batches, the background script could get killed mid-batch by the browser's idle-shutdown timer; now kept alive for the full download run.
Added a retry on transient network failures instead of permanently dropping an image on one bad fetch.
Fixed two settings that looked functional but silently did nothing: "Ta bort bakgrund (heuristik)" and "Fråga var jag vill spara" a variable-naming bug meant neither setting ever reached the code that used it.

--Cross-origin/CORS download fixes--
Switched the background fetch from fetch() to XMLHttpRequest (Firefox's cross-origin permission grant doesn't reliably apply to fetch() from background scripts).
Added a same-origin content-script relay as the first attempt, fixes sites like Proshop where images are hosted on the product page's own domain.
Added a webRequest-based CORS header injection as a further fallback, scoped to only the extension's own background-initiated requests, for sites like Dustin where images live on a totally separate CDN subdomain with no CORS headers at all. Note: this last one still needs your confirmation it's actually working, we were mid-diagnosis on that when you moved to the dark-mode request, so flag it if Dustin downloads are still failing.

--Site compatibility--
Proshop-style sites: now reads embedded gallery JSON (images-json/data-images attributes) to grab every gallery image at full resolution up front, not just the one currently displayed.
Dustin-style sites (Cloudflare Image Resizing URLs): rewrites the width=N parameter to request full resolution directly, so you don't need to open the fullscreen gallery first.

--Output quality--
Export resolution doubled: 1000×1000 → 2000×2000.

--New features--
Configurable download subfolder ("Nedladdningsmapp" setting, default product-images), images now land in Downloads/product-images/<product name>/ instead of directly in the Downloads root.
Dark mode: toggle in the popup header, follows your OS theme by default. Blue accents/outlines in light mode, orange in dark mode (including buttons).
UI polish

Sticky header/toolbar while scrolling large galleries.
Loading indicator while the page is being scanned.
Keyboard shortcuts: Esc closes the popup, Ctrl/Cmd+A selects all.
New extension icon (photo frame + download badge) replacing the default balloon, all four sizes.

--Housekeeping--
Removed ~250 lines of dead/unreachable code left over from an earlier refactor.
New permissions added to the manifest: webRequest, webRequestBlocking, you'll want to explain these in the AMO review notes (CORS workaround for extension-only image fetches).

Fixed some download errors.
Increased resolution size of images to 2000x2000 from 1000x1000

Fixed popup window so settings fit in the window, effectively removing sidescroll for settings