Microsoft Edge 148 Ships Workspace V2 and Copilot Tab

Microsoft has begun rolling out Edge 148 stable (version 148.0.3967.54) to users worldwide, delivering a sweeping architectural overhaul of its Workspaces feature and pushing deeper integration of Microsoft 365 Copilot Chat into the browser's sidebar experience. The update touches multiple modules including password autofill, Microsoft 365 authentication prompts, and a revamped AI settings page.

The most consequential change in this release is the accelerated migration of Workspaces from its original V1 architecture to a new V2 backend, a move Microsoft says is designed to dramatically improve stability and performance. However, the transition comes with a notable trade-off: collaborative and data-sharing capabilities within Workspaces have been removed entirely.

Key Takeaways From Edge 148

• Workspaces V2 migration moves saved data from OneDrive and SharePoint to Edge Sync services
• Collaboration features removed from Workspaces as part of the architecture shift
• Copilot Chat gets an updated internal container page in the Edge sidebar
• Password autofill improvements enhance credential management
• Microsoft 365 authentication popup behavior has been refined
• AI settings page receives updates for better admin and user control

Workspaces V2: A Faster Engine, Fewer Features

The headline change in Edge 148 is the migration of Workspaces — Edge's feature for saving tab groups, window states, and browsing contexts — from its V1 architecture to a completely rebuilt V2 framework. For users unfamiliar with the feature, Workspaces allows you to organize tabs and browsing sessions around specific projects or tasks, making it particularly useful for research, cross-page workflows, and rapid task switching.

Previously, Workspaces data was stored through OneDrive and SharePoint, enabling cloud-based synchronization and collaboration. Under V2, all workspace data migrates to the Edge Sync service, aligning it more closely with Edge's existing sync infrastructure for bookmarks, passwords, and settings.

Microsoft has been transparent about the reason for this shift: improving reliability. The OneDrive and SharePoint-backed system apparently introduced latency and stability issues that the Edge team decided were untenable for a core browser feature. By bringing data management in-house through Edge Sync, the company gains tighter control over the data pipeline.

The Collaboration Trade-Off

The migration to V2 is not without cost. Microsoft has removed collaboration and data-sharing functionality from Workspaces entirely. In the V1 system, users could share workspace configurations with colleagues, enabling teams to maintain shared browsing contexts — a feature that was particularly popular among enterprise users coordinating on research projects or multi-tab workflows.

This removal signals a strategic pivot. Rather than positioning Workspaces as a collaborative tool, Microsoft appears to be refocusing it as a personal productivity feature. The collaboration gap may eventually be filled by other Microsoft 365 tools, but for now, teams that relied on shared Workspaces will need to find alternative workflows.

For organizations that have disabled sync through enterprise policies, there is an important nuance to understand:

• V1 data still migrates even when sync is policy-disabled
• New V2 Workspaces created after migration will not sync across devices
• Local-only storage becomes the default for policy-restricted environments
• No data loss is expected during the migration process itself

This means enterprise IT administrators should be aware that while the migration happens automatically, the resulting behavior depends heavily on existing sync policies. In restricted environments, Workspaces effectively becomes a single-device feature.

Copilot Deepens Its Roots in Edge

On the AI front, Edge 148 updates the Microsoft 365 Copilot Chat experience within the browser's sidebar. The internal container page that hosts Copilot Chat has been refreshed, though Microsoft has not detailed specific UI changes publicly.

More notably, Microsoft is advising administrators not to block the internal Edge URLs that power this Copilot integration. This suggests the company is tightening the coupling between Edge and Copilot, making the AI assistant an increasingly inseparable part of the browsing experience. For enterprise admins who maintain URL allowlists or blocklists, this is a practical consideration that could affect rollout planning.

The Copilot push in Edge mirrors Microsoft's broader strategy of embedding AI capabilities into every product surface. Since launching Copilot across Windows, Office, and Edge in late 2023 and throughout 2024, Microsoft has steadily expanded the assistant's reach. Edge's sidebar has become one of the primary delivery vehicles for Copilot, offering page summarization, content generation, and conversational search directly alongside the browsing experience.

Key Copilot-related changes in Edge 148 include:

• Updated sidebar container for Microsoft 365 Copilot Chat
• Admin guidance to whitelist specific Edge internal URLs
• AI settings page refinements for better control over AI features
• New tab page integration continues to advance for Copilot surfaces

How Edge 148 Compares to Recent Releases

Unlike Edge 147, which focused primarily on security patches and minor UI tweaks, Edge 148 represents a more substantial architectural investment. The Workspaces V2 migration is the kind of behind-the-scenes change that users may not immediately notice but that fundamentally alters how a feature operates.

Compared to competitors like Google Chrome and Mozilla Firefox, Edge continues to differentiate itself through deep Microsoft 365 integration and AI-first features. Chrome has its own Gemini-powered AI experiments, and Firefox has taken a more privacy-focused approach to AI, but neither browser offers the same level of enterprise workspace management that Edge provides through Workspaces.

The removal of collaboration from Workspaces is notable when viewed against the competitive landscape. Arc Browser from The Browser Company and Vivaldi have both invested heavily in collaborative browsing features. Microsoft's decision to strip these capabilities from Workspaces may seem counterintuitive, but it likely reflects a pragmatic engineering choice: fix the foundation first, then rebuild advanced features on a more stable platform.

What This Means for Users and IT Admins

For everyday users, the Edge 148 update should be largely seamless. Workspace data will migrate automatically, and the browsing experience should feel faster and more stable as a result of the V2 architecture. The loss of collaboration features will only affect users who actively shared Workspaces with others.

For IT administrators, the update requires more attention. Several practical considerations include understanding how sync policies interact with the migration, ensuring that Copilot-related URLs are not inadvertently blocked, and communicating to end users that shared Workspaces are no longer available.

The password autofill improvements in this release also deserve attention from a security perspective. While Microsoft has not published granular details about what changed, any modification to credential management behavior should prompt IT teams to verify that autofill policies still align with organizational security requirements.

Looking Ahead: Edge's AI-First Future

Edge 148 reinforces a clear trajectory: Microsoft is building Edge as the browser layer for its AI ecosystem. Every major release in 2025 has deepened Copilot integration, and there is little reason to expect that trend to slow down.

The Workspaces V2 migration, while disruptive in the short term, lays the groundwork for a more robust feature set in future releases. It would not be surprising to see Microsoft reintroduce collaboration capabilities on top of the V2 architecture once the new backend has proven stable at scale. The company has a pattern of removing features during architectural transitions and restoring them later — a strategy it has employed across Windows, Office, and Teams.

For now, Edge 148 is available through the browser's standard update channel. Users can check for the update by navigating to Settings > About Microsoft Edge, where version 148.0.3967.54 should appear. Enterprise deployments managed through Microsoft Intune or Group Policy will follow their configured update schedules.

As browsers increasingly become AI platforms rather than simple web renderers, Edge 148 marks another step in Microsoft's bet that the browser is the most natural home for AI-powered productivity. Whether users embrace that vision — or find the growing AI integration intrusive — remains the central tension in Edge's evolution.