A browser tab reveals ChatGPT or Claude through its title and icon before anyone reads the page. Docognito replaces both the instant a tab loads, with a plain document name and a matching icon. Neither one reverts even when the page tries to rename itself back.
Replace the title and the icon
Two things sit in a browser tab before any content does: the words on the tab and the small icon beside them. the browser tab title, turning something like an assistant name and the first line of a reply into a generic document name instead. the tab icon, so the coloured chat logo becomes a plain document icon. Both happen the moment a tab loads, on claude.ai, chatgpt.com and chat.openai.com, and no other website, with the extension asking for nothing more than one browser permission, storage.
Why the tab is the first thing anyone reads
Anyone with several tabs open scans the tab strip before they read a single page. A row of small titles is how people find the tab they want, and it is also how a name like an assistant brand gets noticed without anyone meaning to look for it. A title that instead reads as an ordinary document name blends into the row rather than standing out from it, which matters more than most people expect given how briefly a tab strip is actually looked at.
Narrow tabs make this worse before it gets better. Once a browser window has a dozen tabs open, each title truncates to a handful of characters, and an assistant name is often the only part left visible once the rest of the words are cut. A generic document name survives that truncation the same way any short, ordinary title does, which is to say it stops mattering whether the window is wide or crowded.
How the title stays changed
The harder part is not setting a new title once. Both ChatGPT and Claude rewrite the tab title themselves, repeatedly, as a conversation continues, often putting the first few words of a reply into the title bar as it streams in. A disguise that only ran once would lose that fight within seconds of the first reply arriving.
Docognito instead keeps watching. It intervenes before the page has a chance to paint its own title for the first time, and it continues watching for the rest of the time the tab stays open, so that every attempt the assistant makes to rename the tab gets caught and replaced again. From the outside this looks like nothing happening at all, which is exactly the point. A reader who checks the tab five minutes into a conversation sees the same plain document name they saw when it opened.
The icon changes just as early
The favicon works the same way and for the same reason. A chat logo sitting in the tab strip is recognisable at a glance, sometimes more so than the title text next to it, because a coloured icon draws the eye before words do. The extension swaps that icon out for a plain document icon at the same early point it replaces the title, and it keeps an eye on the tab afterwards in case the page tries to put its own icon back, which some pages do when they detect a change they did not make themselves.
Choosing your own document name
The default title is a plain, generic document name, and for most people that is enough on its own. The title bar at the top of the document view is also an ordinary editable text field, the same way a title bar in a real document editor works, so typing a new name there replaces it with a project name, a report title, or a client reference. Whatever is typed becomes the tab title from that point forward, replacing both the assistant name and the generic default at once.
What stays the same
Changing the title and the icon does not touch anything else about the tab. the address bar, which still reads claude.ai or chatgpt.com, in full, in the browser's own address field above the page, completely separate from either the title or the icon. Somebody who glances at the tab strip sees a document. Somebody who reads the address bar on purpose sees the real site regardless. A full account of what that means for a closer look, not just a glance, is covered in the tour of the document view and in the shortcut that switches the whole page. A work laptop can add a layer neither the title nor the tab strip has anything to do with, described in what a company laptop can show an employer.
What the tab strip fixes, and what it leaves alone
When the tab strip is the exposure that worries you, the title and the icon are the two things worth fixing, and both change automatically the moment the extension is running. If someone reads your address bar rather than your tab strip, this alone will not cover it, and no title change ever could. Add Docognito and let the tab handle itself from then on.