This was actually answered recently and is to do with chrome more than it is 1Password https://www.reddit.com/r/1Password/s/ZhH8bRMRKL Answer from snowbeluga on reddit.com
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Agilebits
app-updates.agilebits.com › product_history › OPX4
1Password Classic Browser Extension Release Notes
Significantly improved the performance of 1Password's autosave monitoring. {OPX-1414, OPX-1416} Improved the logic for reestablishing connection from the extension to 1Password on Mac.
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gHacks Tech News
ghacks.net › home › software › security › 1password ending support for classic browser extensions
1Password ending support for classic browser extensions - gHacks Tech News
April 20, 2023 - Broken down to its core, 1Password will end support for classic browser extensions, stating that they use extensions Manifest V2 and Google's plans to end support for it in Chrome.
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Reddit
reddit.com › r/1password › where can i download the 1password classic extension for chrome.-
r/1Password on Reddit: Where can I download the 1Password Classic Extension for Chrome.-
October 1, 2024 -

I purchased a "Perpetual" license for 1Password 7 just one week before they announced the switch to a subscription-based model. To me, it's frustrating and feels like an unfair business practice. Why sell a perpetual license and then make it nearly impossible for your customers to get the extension for supported browsers and operating systems?

If I choose to continue using "outdated" software and OS, that's my choice, but at the very least, I should be able to access the tools I paid for. I also strongly resist buying into subscription-based software and entering what I see as the "Subscription Exploitation Economy."

I've tried downloading the extension "1Password-4.7.5.90.crx" from multiple sources, only to be hit with the infamous "Error 400." I even found official posts from 1Password staff linking to the file, but the same error persists.

Does anyone know where I can download the classic extension that works for 1Password 7? Any help would be greatly appreciated!

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1Password
support.1password.com › update-1password-browser
How to keep 1Password up to date in your browser | 1Password Support
Click the Edge menu in the toolbar and choose Extensions, then click Manage Extensions. Find 1Password and click Details to see the version number. If you see “1Password classic extension”, upgrade to the latest version of 1Password for Edge.
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TidBITS
talk.tidbits.com › tidbits talk
The 1Password classic extension will stop working in July 2023 - TidBITS Talk - TidBITS Talk
May 31, 2023 - You might as well consider 1Password 7 obsolete now, and discard your licenses. This is it: move to 1P v8, or switch. 1P8 is still a good product and is not without its attractions. I’m reminded of that every time I carefully fill out a new entry and add in custom fields with semantics, like ...
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1Password
1password.com › downloads › browser-extension
Download the Best Password Manager for Your Browser | 1Password
Download the 1Password browser extension for Chrome, Microsoft Edge, Safari, Vivaldi and other browsers. Stay safe online with the best password manager.
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1Password
1password.com › downloads › windows
Download 1Password for Windows | 1Password
Download 1Password for · Operating Systems · Windows · macOS · Linux · Browser Extensions · Chrome · Firefox · Safari · Edge · Brave · Mobile Apps · iOS · Android · Developer · CLI · Windows · Protect passwords, credit cards, and more with the best password manager for Windows.
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Mozilla Bugzilla
bugzilla.mozilla.org › show_bug.cgi
1725232 - Autofill from 1Password classic extension doesn't work in Nightly anymore
This would be a major benefit for Firefox users on the classic extension, we wouldn't want to leave them without the functionality. ... we've noticed that password autofill is not working well in recent Firefox Nightly using the 1Password classic extension (guid [email protected]).
Find elsewhere
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1Password Community
1password.community › 1password in the browser
Two different chrome extensions — 1Password Community
December 20, 2020 - The "1Passowrd extension (desktop app required) is our good old 1Password Classic extension. It connects to the desktop app and allows it to interact with your browser and autofill in websites.
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Extpose
extpose.com › ext › aomjjhallfgjeglblehebfpbcfeobpgk › en
1Password extension (desktop app required) - aomjjhallfgjeglblehebfpbcfeobpgk - Extpose
Extends the 1Password app on your Mac or Windows PC, so you can fill and save passwords in your browser. ... ⚠️ The 1Password classic extension requires the 1Password Mac or Windows app: https://1password.com/downloads/
Rating: 3.3 ​ - ​ 1.54K votes
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Microsoft Edge
microsoftedge.microsoft.com › addons › detail › dppgmdbiimibapkepcbdbmkaabgiofem
1Password – Password Manager - Microsoft Edge Addons
Make Microsoft Edge your own with extensions that help you personalize the browser and be more productive.
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Mozilla Add-ons
addons.mozilla.org › en-US › firefox › addon › 1password-x-password-manager
1Password: Password Manager – Get this Extension for 🦊 Firefox (en-US)
October 28, 2025 - Download 1Password: Password Manager for Firefox. The best way to experience 1Password in your browser. Easily sign in to sites, generate passwords, and store secure information, including logins, credit cards, notes, and more.
Rating: 3.8 ​ - ​ 1.77K votes
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Chrome Web Store
chrome.google.com › webstore › detail › 1password-–-password-mana › aeblfdkhhhdcdjpifhhbdiojplfjncoa
1Password – Password Manager - Chrome Web Store
If you don’t have one yet, you ... Chrome! Go passwordless today and start using passkeys. 1Password is a password manager that keeps you safe online....
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GitHub
github.com › blueboxd › chromium-legacy › issues › 178
[BUG] Manifest V3, bye 1Password Classic extension? · Issue #178 · blueboxd/chromium-legacy
September 21, 2023 - Describe the bug Yesterday I've installed Chromium-legacy 117.0.5938.88.1 and right away noticed that 1Password Classic extension stopped working, while in older versions it worked fine. I'...
Published   Sep 21, 2023
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Agilebits
app-updates.agilebits.com › product_history › OPW6
1Password for Windows Release Notes
We've implemented a change to make sure the connection between the 1Password app and browser extension continues to work properly in the upcoming versions of Microsoft Edge, Chrome, and other Chromium-based browsers. {OPW-!2717} Added a deprecation notice about the 1Password Classic extension.
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1Password Community
1password.community › 1password community › discussions › 1password at home
1Password for Windows version 7.9.835 - disables Classic extension on Firefox 119.0 | 1Password Community
I know that you dropped support for 1PW Version 7 (no 1 will not upgrade to version 8 since there is no local vault support any more and a hosting on premise is also not available) but today's update does not only "Updated the notice about the now deprecated 1Password Classic extension" it also makes it unusable with Firefox 119.0.
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1Password
releases.1password.com › b5x › stable
1Password Releases
We’ve improved extension performance and reduced disk input/output on page load. !31221 · We’ve fixed an issue where the passkey prompt wouldn’t appear on accounts.google.com. #39010 · We’ve fixed an issue where you couldn’t see the banner to unlock the 1Password extension when you created a passkey.
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Reddit
reddit.com › r/1password › links to 1password7 browser extensions (legacy)
r/1Password on Reddit: Links To 1Password7 Browser Extensions (Legacy)
June 8, 2023 -

There appears to be no more links to the Legacy 1Password v7 browser extensions by Agilebits on the official website, but luckily, archive.org exists! I've gone ahead and extracted the "key" for the legacy extensions for you to download and install, so you so choose.

I think it's important for everyone to be able to make their own decisions on how they manage and use their machines.

**ATTN AGILEBITS TEAM*: Please do not remove these packages, as it will open the door for malicious individuals to poison the search results once the legacy extensions go 404.* **

FOR WINDOWS & MACOS BROWSERS:

Chrome & Chromium-Core Browsers (Opera, etc)g: Grab From https://chrome.google.com/webstore/detail/1password-extension-deskt/aomjjhallfgjeglblehebfpbcfeobpgk

If you are interested in the direct download link, it is: https://clients2.google.com/service/update2/crx?response=redirect&os=win&arch=x64&os_arch=x86_64&nacl_arch=x86-64&prod=chromiumcrx&prodchannel=beta&prodversion=79.0.3945.53&lang=ru&acceptformat=crx3&x=id%3Daomjjhallfgjeglblehebfpbcfeobpgk%26installsource%3Dondemand%26uc

MD5: bc0a04908497cc48edaf566a56e66a1b
SHA256: a7d737d79033e9359aa5aaffa36a12e604f4d7f8557d75cd1e4e33db74951911
SHA512: aa48899e338f272337c739d4288fe5c037dd09f8360d3ac5a02fce95a7d62624d215f048e47a4ddc475c88ff970ec5f036208bdc66fa2f724111000f7b401e2e

https://clients2.google.com/service/update2/crx?response=redirect&os=win&arch=x64&os_arch=x86_64&nacl_arch=x86-64&prod=chromiumcrx&prodchannel=beta&prodversion=79.0.3945.53&lang=ru&acceptformat=crx3&x=id%3Daomjjhallfgjeglblehebfpbcfeobpgk%26installsource%3Dondemand%26uc

You can verify this is the correct extension by DDG/Google/Bing searching for "aomjjhallfgjeglblehebfpbcfeobpgk".

Via Edge (Microsoft): Same process, DDG/Google/Bing: "aomjjhallfgjeglblehebfpbcfeobpgk" and Microsoft Edge Browser should automatically prompt you with the option of downloading and using the legacy extensions.

Via Mozilla Firefox: The extension is available here: https://cdn.agilebits.com/dist/1P/ext/1Password-4.7.5.90.xpi
MD5: 9aa29cdd97ba3a58b668e48823fd6167
SHA256: 2a983d4391fde3d3732490e94e77dced934014e02730b564dda3e068e0b6f7fb
SHA512: 93e5ea7ce6b38bb5e4549c590d6331b823c97e91ccdadca104104cb85731545967e0a155263c33b1bcd65c2de7f0c40d0f0f0bd3f8a3ff4ea1589228e19e7e52)

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1Password
1password.com › downloads › android
Download the Best Password Manager for Android | 1Password
Download 1Password for · Mobile Apps · Android · iOS · Operating Systems · macOS · Windows · Linux · Browser Extensions · Chrome · Firefox · Safari · Edge · Brave · Developer · CLI · Android · Protect passwords, financial data, and more with the best password manager for Android devices.