Passfill

Install — do this in order

Steps 1–2 are identical for every browser. Step 3 splits: Chromium family vs Firefox. Your browser is highlighted when we can detect it. Why not one-click?

1. 1

   Download the package

   Get the zip from this site — not a random mirror. One file, no account, no email wall.

   Download rehnova-passfill.zip

   Why a zip? Browsers install from a folder of files. The package is one zip for a single download — it still expands to multiple files (required by the browser). Inside: code + LICENSE + COPYRIGHT.

2. 2

   Unzip to a permanent folder

   Right-click → Extract All (Windows) or double-click (Mac/Linux). You need a folder that contains manifest.json at the top level (alongside background.js, popup.html, etc.).

   Recommended path: Documents\rehnova-passfill — not Downloads (easy to “clean up” later by accident).

   Why not delete after install? The browser keeps using those files — see “Why keep the folder” under Why this way.

3. 3

   Load it into the browser

   This is the only “weird” step. You are telling the browser: trust this folder on my machine as an extension. Developer mode unlocks that for free packages.

   Chrome · Edge · Brave · Arc

   1. Paste this in the address bar and hit Enter:
      chrome://extensions Copy
      Edge: edge://extensions · Brave: brave://extensions · (links from websites cannot open those pages for security reasons — you must type/paste.)
   2. Toggle Developer mode ON (usually top-right). Why? Without it, the browser only installs signed store packages. Developer mode is how free/unpacked tools are allowed to run.
   3. Click Load unpacked → select the unzipped folder (the one that contains manifest.json, not the zip file itself).
   4. Confirm REHNOVA Passfill appears in the list. Open the puzzle-piece menu → pin Passfill for one-click access.

   Firefox (115+)

   1. Paste this and hit Enter:
      about:debugging#/runtime/this-firefox Copy
   2. Click Load Temporary Add-on…
   3. Select manifest.json inside the unzipped folder (not the zip).
   4. Pin Passfill from the extensions menu.

   Why “temporary”? Firefox will not permanently install unsigned free add-ons from a random zip without their store (AMO) or a signed build. Temporary load is the free path. After a full Firefox quit, open the same debugging page and load manifest.json again — same folder, 10 seconds.

4. 4

   First run (60 seconds)

   1. Click the Passfill icon → open the popup.
   2. Enable AES lock — set a master passphrase (min 8 chars). This encrypts saved logins on disk.
   3. Open any signup page → focus the password field → click the green ⚡ gen chip (or Generate in the popup).
   4. When Passfill asks to save, hit Save if you want it remembered.
   5. Leave and come back later → use the Fill bar. Done.

   Permissions you will see (storage, access to sites) exist so Passfill can detect password fields and store the vault on your device. Nothing is uploaded to REHNOVA.