Installing a Chrome extension normally takes under a minute through the Chrome Web Store, and Docognito follows that exact process. Search the store, click add, and approve the single storage permission Chrome shows before install. It only activates on claude.ai, chatgpt.com and chat.openai.com, not Gemini or any other assistant.
Before you start
Docognito is free, needs no account, and installs the same way any other Chrome extension does, through the Chrome Web Store rather than a separate download or an installer file. The whole process is three clicks and one permission prompt.
It is worth knowing in advance what it does and does not cover, so the result matches what you expected. It redraws the visible page, redrawn as a document editor on the sites it supports, and rewrites the browser tab title and the tab icon to match. It is scoped to claude.ai, chatgpt.com and chat.openai.com, and no other website, and nothing else. It does not touch the address bar, and it does not need a second extension or a companion application running alongside it to work.
Installing it
Open the Chrome Web Store listing
Go to the Docognito page on the Chrome Web Store, either by searching "Docognito" from within Chrome's extension menu or by following a direct link to the listing.
Click Add to Chrome
Chrome shows a permission prompt before anything installs. Read it, it is short.
Approve the permission and confirm the install
Click Add extension in that prompt. Chrome installs it immediately, with no further screens or setup steps.
That is the entire installation. There is no account to create, no onboarding walkthrough, and no additional configuration required before it works. Clicking the extension icon afterwards opens a small popup with two controls, a switch for whether the disguise is on, and a choice between light and dark, and both are optional rather than a setup step you have to complete first.
What the permission prompt actually shows
Chrome discloses every permission an extension requests before it installs, in its own words rather than the developer's. Docognito's prompt lists one line: one browser permission, storage.
Storage is a narrow permission. It lets the extension remember two small settings, whether the disguise is switched on, and whether it displays in light or dark mode, between visits. It grants no access to your browsing history, no ability to read other websites, and no way to see your network traffic. There is nothing broader hiding behind that one line, and Chrome's own prompt is the proof, since it lists exactly what is being requested and nothing more.
A permission request that only asks for storage is on the narrow end compared with most extensions, which commonly request access to tabs, browsing data or every website you visit. There is no separate warning screen about broader access to click past, because Docognito never asks for any.
Which sites it actually works on
claude.ai, chatgpt.com and chat.openai.com, and no other website That is the complete list. Opening Docognito's icon on Gemini, Perplexity, Copilot, or any site outside those three does nothing, because the extension has no code that runs anywhere else.
| Site | Works |
|---|---|
| claude.ai | Yes |
| chatgpt.com | Yes |
| chat.openai.com | Yes |
| Gemini, Copilot, or any other assistant | No |
The scope is deliberate rather than an oversight. Each supported site needed its own tailored logic to redraw its interface correctly, and that work has only been done for the three listed here.
A newly opened tab needs a fresh load before the disguise engages
An extension can only attach to a tab from the point it finishes loading after install. If you already had claude.ai or chatgpt.com open in another tab when you installed Docognito, reload that tab once. Any tab opened afterwards works without a manual reload.
Confirming it actually installed
After adding it, open a new tab and go to chatgpt.com or claude.ai. The page should redraw itself as a document editor within a moment of loading. If it does not change at all, the most likely cause is the tab having loaded before the install finished, covered in more depth in fixing Docognito when it stops working.
You can also check chrome://extensions directly. Docognito should be listed there, switched on, with the storage permission shown underneath its name. That page is Chrome's own record of what is installed, independent of anything the extension itself reports.
If the toolbar icon does not show
Chrome tucks newly installed extensions behind the puzzle piece menu at the right of the address bar by default, rather than pinning them to the visible toolbar. This is normal, not a sign that something failed, and it has no effect on whether the disguise itself works. If you want the icon sitting in plain view, pinning the Docognito icon covers exactly that.
Three clicks, then one reload
Installing Docognito is the same three clicks as any other Chrome extension: find the listing, click add, approve the storage permission. It only runs on claude.ai, chatgpt.com and chat.openai.com, and no other website, and a tab needs to load after the install before the disguise takes hold in it.
Use Docognito to start, then reload any claude.ai or chatgpt.com tab you already had open.