feat(extensions): Bear Split — side-by-side split view (Arc gap closure) - #155
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extensions/bear-split/ — MV2 WebExtension for LibreWolf/Firefox:
manifest.json:
- CMD+SHIFT+\ / Ctrl+Shift+\ keyboard shortcut to open split view
- browser_action toolbar button
- web_accessible_resources: split.html
- gecko id: bear-split@bearbrowser.local
background.js:
- commands.onCommand("open-split"): opens split.html?left=<current-url>&right=about:blank
- browserAction.onClicked: same; takes current tab URL as left pane seed
split.html (fully self-contained, no external deps):
- Two URL bars (LEFT/RIGHT labels) + two iframes side by side
- Draggable divider: mousedown → mousemove adjusts flex widths; iframes
get pointer-events:none during drag to prevent event capture
- Min pane width 80px; divider highlights teal (#39C5CF) on hover/drag
- URL input: Enter or Go button navigates; auto-prefixes https:// if no scheme
- sandbox: allow-scripts allow-forms allow-same-origin allow-popups allow-downloads
- Memory mesh ping on open + on each navigation (POST localhost:7788/api/append)
icons/split-48.svg:
- Two rectangles with dashed center divider, brand teal
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Summary
Arc's split view is one of its most-used productivity features. Bear Split closes that gap.
CMD+SHIFT+\(orCtrl+Shift+\on Linux) opens the current tab in a split view with the same URL on the left and a blank pane on the right. Navigate each pane independently.Features
https://POST localhost:7788/api/appendsplit.htmlhas all CSS and JS inline, zero external assetsLoad
about:debugging→ This Firefox → Load Temporary Add-on →extensions/bear-split/manifest.jsonThen: toolbar button or
CMD+SHIFT+\Test plan