Circa 0.66.0

Optional tab previews and docked developer tools.

• Tab hover previews are now off by default. Enable “Show tab hover previews” in Advanced Settings; changes apply immediately and your choice is remembered after restarting.
• The fullscreen exit reminder now disappears automatically without leaving fullscreen.
• Picture in Picture’s return-to-tab button selects and brings forward the original page. Closing Picture in Picture keeps the current tab selected.
• Developer tools open docked on the right by default. Their dock menu lets you choose the left, bottom, right, or a separate window.

Engine r18

Chromium 156.0.8078.88, preserving the existing security and extension patch baseline.

Adds source-window activation and an additive native developer-tools hosting API. Includes the previous lifecycle, allocator-purge and bounded preconnect API additions without enabling new product policies.

Qualified with API-prefix compatibility, native PiP return/close, all four developer-tools placements, and existing diagnostics/extensions, security/media/history and performance smokes. Full application validation and owner video approval remain separate from this engine distribution.

Infrastructure prerelease only; does not update the browser release channel.

Circa 0.65.0

Rich tab previews, with sharp Retina thumbnails.

• Hover over a sidebar tab to see its cached page preview and title without switching pages.
• Pin or unpin the tab, add it to Favorites, open it in Split View, or open the Assistant with that tab as context. The Assistant action never sends a message automatically.
• Previews appear quickly and switch immediately as you move between tabs. Reduced Motion skips the preview animations.
• Thumbnails use the display's backing resolution for crisp text on Retina screens.
• Hovering does not load sleeping tabs. When no valid cached image is available, the card shows the tab's icon and title.

Circa 0.64.0

Native overlay scrollbars for web pages.

• Added “Overlay scrollbars on web pages” in Advanced Settings, off by default.
• When enabled, thin native scrollbars float over page content and fade away when idle, including on sites that style their own scrollbars.
• Restart Circa after changing the option. Turning it off restores the usual system and website presentation.
• Scrollbars explicitly hidden by a site stay hidden.

Circa 0.63.1

Edge-to-edge pages and quieter sidebar controls.

• Pages now reach the window edges by default. Turn on “Space around pages” in Advanced Settings to restore the previous margins.
• Pinned extension icons follow the address field’s hover state and remain visible while their popup is open.
• Added “Use dots for Space icons” in Advanced Settings. Turning it off restores your chosen icons.
• Space dots form a compact group, while chosen icons keep their existing spacing.
• The fullscreen sidebar button’s hover background aligns with the address field and Favorites.

Circa 0.62.3

Lighter toolbar icons and clearer Favorites.

• Refined back, forward, reload and sidebar icons with thinner rounded strokes.
• Aligned the sidebar button with the address field in full screen.
• Added subtle rounded borders to inactive Favorites while keeping the selected outline.

Circa 0.62.2

Fix password import from CSV files.

• Site addresses without a trailing slash, with mixed capitalization or with a default port now import and verify correctly.
• Reimporting the same credentials recognizes entries already in the password store.

Circa 0.62.1

Restore camera and microphone access for website calls on macOS.

• Signed builds now declare the camera and audio-input capabilities required by macOS Hardened Runtime.
• Website permission choices and macOS privacy permissions continue to control access.

Circa 0.62.0

More consistent haptic feedback when organizing tabs and resizing the sidebar.

• The existing Settings switch now covers tab organization and resizing.
• Valid sidebar, folder and split drop-target transitions trigger native alignment feedback.
• Crossing the sidebar collapse threshold also triggers feedback.
• Repeated pointer updates and rejected targets do not produce extra pulses.

Circa 0.61.2

Circa improves enforcement of the sites you exclude from AI page access.

• Keeps your AI site exclusions effective across additional host name formats.
• Preserves existing browsing data and settings.