i have multiple google accounts, i want to be logged on all of them but not on the same place, what set-up with containers do you recommend for firefox?

Grok 4.3

Answer: Use Firefox's Multi-Account Containers extension to create a dedicated container for each Google account.

All other models converge on the identical core recommendation, confirming that the Multi-Account Containers extension provides the most practical isolation of cookies and sessions within a single Firefox window. The detailed guidance from Claude on manual container selection for non-assigned domains and GPT-5.5's distinction between containers and full profiles adds useful implementation nuance, yet does not alter the fundamental approach. This setup remains superior for everyday use because it balances strong separation with minimal overhead, while separate profiles are reserved only for cases needing completely distinct browser environments.

Gemini 3.5 Flash

Answer: To keep multiple Google accounts logged in simultaneously and fully isolated in Firefox, the best setup is to use the official Firefox Multi-Account Containers extension with a dedicated, custom container created for each individual Google account.

I am maintaining my position that the Firefox Multi-Account Containers extension is the premier solution for this use case. However, the feedback from GPT-5.5 and Claude Opus 4.7 highlights a critical technical limitation in my previous implementation advice that must be addressed for a seamless setup: Firefox only allows a domain (like mail.google.com) to be automatically assigned to a single container. To resolve this domain-mapping conflict, you should assign Google domains to 'Always open in' only for your primary Google account container. For all subsequent Google accounts (such as work or school), you must open the dedicated container manually first—either by long-pressing the new tab '+' button, using keyboard shortcuts, or utilizing container-specific bookmarks—and then navigate to Google services. This prevents Firefox from incorrectly redirecting your secondary accounts into your primary account's container. Additionally, as suggested by the other models, keeping your default (non-container) tabs completely logged out of Google is an excellent practice for privacy, preventing your general web browsing from being linked to any of your Google identities. This refined approach provides the ultimate balance of convenience, isolation, and privacy within a single, lightweight browser window.

GPT-5.5

Answer: Use Firefox Multi-Account Containers with one dedicated container per Google account, keeping your normal/default tabs logged out of Google.

I’m maintaining my position: the best Firefox setup is still one persistent container per Google identity, for example “Google Personal,” “Google Work,” “Google Client A,” each with its own color and icon. The key reason is that Firefox containers isolate cookies and site storage, so each container can stay logged into a different Google account at the same time. That means you can have Gmail, Drive, Calendar, YouTube, etc. open side by side without constantly switching accounts or accidentally mixing sessions. The important practical detail, highlighted well by the other answers, is that auto-opening Google domains has limits: the same domain like google.com or mail.google.com generally cannot be automatically assigned to multiple containers at once. So I’d use “Always open in” only for your main/most-used Google account, or avoid it for Google entirely and instead manually open the correct container first. For reliability, pin a Gmail/Drive/Calendar tab inside each account’s container so you always enter from the right place. My recommended setup would be: no Google login in regular/default tabs; one container for each Google account; clear names/colors/icons; pinned Google service tabs per container; and optional extra containers for “Banking,” “Shopping,” or “Social” if you also want non-Google tracking separation. If you need stronger separation than cookies and sessions—different extensions, history, bookmarks, proxy/VPN settings, or Firefox Sync identities—then use separate Firefox profiles. But for simply staying logged into multiple Google accounts in the same browser, “Firefox Multi-Account Containers” is the right tool.

Claude Opus 4.7

Answer: Use the Firefox Multi-Account Containers extension and assign each Google account to its own dedicated, persistent container so cookies and sessions stay completely isolated from each other.

I'm maintaining my position because every model converged on the same core answer — Firefox Multi-Account Containers with one container per Google account is the canonical, correct solution. There's no real disagreement to resolve, only complementary details worth folding in. That said, reading the other responses sharpened a few practical points I want to reinforce or adjust in my original setup: 1) The domain-assignment caveat I raised is the key gotcha. Grok and Gemini gloss over it, but GPT-5.5 correctly notes the same issue: a Google domain can only be auto-assigned to ONE container. So 'Always open in this container' works cleanly only for your primary account; for the others you must manually open the container first (long-press the '+' new tab button, or right-click → 'Open Link in New Container Tab'). Sessions then persist indefinitely in each container. 2) GPT-5.5's suggestion to keep the default (no-container) tab logged OUT of Google is a genuinely good refinement I'd add to my setup — it prevents your 'default' browsing identity from silently becoming one of your Google accounts. 3) GPT-5.5 also correctly notes the limit of containers: they isolate cookies and site storage, but not extensions, history, or bookmarks. If you need stronger separation (e.g. work vs personal devices-of-record), use separate Firefox profiles via about:profiles. For most people juggling multiple Google logins, though, containers are the right tool — lighter weight, single window, unified bookmarks/history. So the recommended setup remains: - Install Firefox Multi-Account Containers (official Mozilla extension). - Create one container per Google identity (Personal, Work, Client A…), each with a distinct color/icon. - Assign google.com / mail.google.com / youtube.com to 'Always open in' your primary account's container only. - For other accounts, open the container manually, sign in once, and the session persists. - Keep the default container signed out of Google. - Escalate to separate Firefox profiles only if you need isolated extensions/history/bookmarks per identity.

Final Summary

The AI Roundtable unanimously recommended the official Multi-Account Containers extension for isolating Google sessions within a single window. Claude Opus 4.7 and GPT-5.5 highlighted a key technicality where domains can only be auto-assigned to one container, suggesting manual entry for secondary accounts. Gemini 3.5 Flash and Grok 4.3 agreed this setup is superior to separate browser profiles for daily convenience.

All 4 models agreed