Autofill is the feature people notice only when it stops. One day the extension quietly fills your login, and the next it ignores the field entirely, offers nothing, or fills the wrong value. The good news is that autofill failures follow a short list of causes, and most of them live on your own device rather than in your account.
Start by confirming the scope. Does autofill fail on one website or on every website? Does it fail in every browser or just one? The answers tell you immediately whether you are chasing a single stubborn form or a broken installation, and they save you from reinstalling an app that was never at fault.
Check the extension and the app
On desktop, autofill depends on the browser extension talking to the OnePassword app. If either half is missing, disabled, or out of date, the fields stay empty. Open your browser's extension settings and confirm that the OnePassword extension is installed, enabled, and allowed to run on the site in question — private browsing windows, in particular, disable extensions by default until you explicitly permit them.
Then check the app itself. A desktop app that is signed out cannot serve credentials to the extension, so a routine onepassword login may be all that stands between you and working autofill. After signing in, lock and unlock the app once to refresh its connection to the browser.
Look for a competing password manager
Browsers now include their own password managers, and several of them fight over the same form fields. When two autofill tools compete, the loser is usually the one you actually want. Turn off the browser's built-in password saving for a test, or set OnePassword as the preferred provider in the browser's autofill settings, and watch whether the correct icon finally appears.
The same conflict appears on phones, where the system's password service and OnePassword both offer to fill fields. Selecting OnePassword as the default autofill provider in your device settings resolves it in one step, and the choice survives app updates.
Understand the stubborn websites
Some websites deliberately make autofill harder. Banks and government portals often split username and password across separate pages, use unusual field names, or render the form inside a frame that confuses extensions. Multi-step logins — where the password field only appears after the username is accepted — are a classic case: autofill may fill the first step and appear to do nothing, when in reality it simply has nothing to do on the second.
For these sites, the fallback is built in. Open the OnePassword extension, search for the item, and copy the value or drag it into the field. It takes two extra seconds and always works, which is why we recommend it as the pragmatic answer rather than fighting the form.
Check the address the vault knows
OnePassword matches saved logins to websites by their address, and a mismatch silently disables autofill. If a login was saved for an older version of a page — a different subdomain, or http instead of https — the extension will not offer it on the new address. Open the item, check the website field, and add the current address as an additional one. The item then matches both.
This is also the explanation for the "wrong password gets filled" complaint. The item itself is fine; it simply belongs to a different account on the same domain, and reordering or renaming the entries makes the right one win.
Reset the connection cleanly
If everything above checks out, restart the chain in order: quit the browser completely, restart the desktop app, then reopen the browser. This rebuilds the connection between the extension and the app, which is where most stale-state problems live. On mobile, the equivalent is force-closing the app and the browser, then confirming OnePassword still holds the autofill permission in system settings after an operating-system update.
Persistent, single-site failures are worth reporting — but report them to the right place. OnePassword's official support team collects compatibility issues and can tell you whether a fix is already in progress. This fan site can explain how autofill works, but it cannot change how your browser or your bank's login page behaves.