1.1.0
New: sort the list before you capture it.

On a BiblioCommons list page, the popup's Capture tab now has a Sort dropdown: List order (the default — the curator's order, unchanged), Title, Author (last name), or Call number. The captured rows come out in the order you chose, so the list pastes into Booklister already arranged.
Title sort ignores leading articles (The/A/An), author sort files by last name with no-author titles last, and call-number sort shelves lettered numbers (FIC, LC) ahead of Dewey with proper numeric ordering. Sort resets to List order each time the popup opens.
The First 13/14/15 quick-select buttons now pick the first N of the current sort order.
Reliability: the right-click menu items are re-registered on browser startup (they could go missing after a restart on Firefox), and the popup shows an error message instead of a stuck "Loading…" if the active tab can't be read.

Bug fixes from a code review. No new features.

Fixed the right-click context menu items ("Clear accumulated list" on the toolbar icon, "Capture for Booklister" on catalog pages) never appearing on Chrome and Edge. A polyfill API misuse threw during menu setup and was silently swallowed; Firefox was unaffected.
The "Capturing N titles — stay on this tab" notice now stays on screen for the duration of the capture instead of disappearing after 1.5 seconds.
If a capture's clipboard copy succeeds but the accumulated list can't be saved (storage full), the confirmation toast now says so instead of reporting the title as added.
Removed the unused scripting permission from the manifest.
Clearer wording for how the preferred-branch setting matches branch codes (exact match) vs branch names (substring).