The best Chrome alternative for Windows 7 is Thorium Browser (Chromium-based, supports Google account sync), and the best Firefox alternative is Floorp Browser (Firefox-based, supports Windows 7 32-bit and 64-bit). Both are open-source, actively updated, and work on Windows 7 SP1 and Windows 8.1 without any compatibility warnings.
Applies to: Windows 7 (SP1+) and Windows 8.1 | Last updated: April 11, 2026
Key Takeaways
- Thorium Browser is a Chromium-based replacement for Google Chrome that runs on Windows 7 and lets you sign in with your Google account to sync bookmarks and data.
- Floorp Browser is a Firefox-based alternative that supports Windows 7 in both 32-bit and 64-bit versions, with a familiar Firefox-like interface.
- Both browsers are open-source, actively maintained, and run modern web standards — sites like Gmail work without any “unsupported browser” errors.
- If AVX2 or AVX installers do not work on your system, Thorium also provides Windows XP-compatible builds that run on older Windows 7 hardware.
Quick Steps
- For a Chrome replacement, go to thorium.rocks and click the Windows 7 download link.
- On the GitHub releases page, download the AVX2 Mini Installer (or AVX/Windows XP version if AVX2 does not work).
- Run the installer and sign in with your Google account to import Chrome bookmarks.
- For a Firefox replacement, go to the Floorp GitHub releases page and download the 64-bit or 32-bit installer.
- Run the Floorp installer, choose Standard installation, and launch the browser.
In This Guide
- Thorium Browser — Chrome Alternative for Windows 7
- Floorp Browser — Firefox Alternative for Windows 7
Thorium Browser — Chrome Alternative for Windows 7
If you have been using Google Chrome on Windows 7, you have probably seen the message saying Chrome is no longer supported on your operating system. Thorium is the best replacement because it is built on the latest version of Chromium, which means every website that works in Chrome also works in Thorium — including Google account sync for bookmarks, passwords, and extensions.
How to Download and Install Thorium
Head over to thorium.rocks and scroll down until you see the Windows 7 download link. Click on it, and you will be taken to a GitHub page with the Thorium releases specifically built for Windows 7.
On the GitHub releases page, scroll down to find the installer files. You will see several options depending on your hardware:
- AVX2 Mini Installer — best option if your Windows 7 installation is fully updated
- AVX Mini Installer — use this if the AVX2 version does not work
- Windows XP 64-bit or 32-bit — fallback option for older hardware that does not support AVX instructions
I was running a Windows 7 installation that was not fully up to date, so the AVX2 version did not work for me. I went with the standard AVX installer instead. Click on the installer link, then click Save when your browser prompts you. After the download finishes, you may see a security warning — just click Run to start the installation.
Tip: If you are not sure whether your CPU supports AVX2 or AVX, start with AVX2. If the installer fails or the browser crashes on launch, try the AVX version next, then the Windows XP build as a last resort.
Once installed, Thorium will launch automatically. You can click Sign in to log into your Google account, and Thorium will sync all your Chrome bookmarks, saved passwords, and browsing data. If you prefer not to sync, you can skip this step and start browsing immediately.
After setting it up, I tested it with Gmail and several other modern websites. Everything loaded without any errors or “unsupported browser” warnings. That is the advantage of Thorium running on the latest Chromium engine — it stays compatible with modern web standards even though the operating system is old.
Floorp Browser — Firefox Alternative for Windows 7
If you prefer Firefox over Chrome, Floorp is the browser you want. It is built on the Firefox engine (Gecko) and has a very similar interface, so the transition from Firefox feels natural. Floorp is open-source and actively developed, with regular releases on GitHub.
How to Download and Install Floorp
Go to the Floorp GitHub releases page and find the latest release. You will see installer options for both 64-bit and 32-bit Windows. Download the one that matches your system — if you are not sure, most Windows 7 installations from 2012 onward are 64-bit.
Click Save when prompted, then Run the installer after the download completes. The installation wizard is straightforward — select Standard installation, click Next, then Install. Once it finishes, click Finish to launch Floorp.
Floorp does not natively sync with your existing Firefox profile, but you can manually import bookmarks using the built-in import tool. Once it is set up, Floorp works just like Firefox — I tested Gmail and other modern sites on Windows 7 and everything loaded without issues.
Note: Floorp supports Firefox extensions from the Mozilla Add-ons store, so you can install the same add-ons you were using in Firefox.
Which Browser Should You Choose?
If you were a Chrome user, go with Thorium. It syncs with your Google account and feels identical to Chrome. If you were a Firefox user, go with Floorp — it uses the same engine and supports Firefox extensions. I recommend installing both and trying them for a few days to see which one feels right for your workflow.
Both browsers are lightweight enough for older hardware. If your Windows 7 machine is low on resources, Floorp tends to use slightly less memory than Chromium-based browsers, but the difference is small in everyday browsing.
Still Running Windows 7? Consider Upgrading
While Thorium and Floorp solve the browser problem, Windows 7 itself stopped receiving security updates in January 2020. If your hardware supports it, I would strongly recommend upgrading from Windows 7 to Windows 10 without losing your data. If you need to stick with Windows 7 for now, at least make sure you have Service Pack 1 installed and a solid antivirus in place.
You might also find these guides helpful if you are working with Windows 7:
- How to install Google Chrome on Windows 7 (for cases where Chrome still partially works)
- Create a Windows 7 bootable USB with Rufus
- Download the Windows 7 multi-edition ISO
Frequently Asked Questions
Are Thorium and Floorp safe to use on Windows 7?
Yes, both browsers are open-source projects with their source code publicly available on GitHub. They receive regular updates that include security patches. That said, keep in mind that Windows 7 itself no longer receives security updates from Microsoft, so using any browser on it carries inherent risk.
Can I import my Chrome bookmarks into Thorium?
Yes. When you first launch Thorium, you can sign in with your Google account and it will automatically sync your bookmarks, saved passwords, and browsing history from Chrome. This works because Thorium is built on the same Chromium engine that Chrome uses.
Does Floorp support Firefox extensions?
Floorp supports extensions from the Mozilla Add-ons store since it is built on the Firefox engine. You can install most of the same extensions you were using in Firefox, including popular ones like uBlock Origin and Bitwarden.
What if the Thorium installer does not work on my computer?
Try a different installer variant. Start with the AVX2 Mini Installer, then try the AVX version, and finally the Windows XP 64-bit or 32-bit build. The Windows XP builds have the broadest hardware compatibility and should work on virtually any Windows 7 machine.
Will these browsers also work on Windows 10 and 11?
Yes, both Thorium and Floorp work on Windows 10 and Windows 11 as well. However, if you are running a newer version of Windows, Chrome and Firefox are still fully supported, so there is less reason to use alternatives unless you prefer the features these browsers offer.
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