A browser editor may work directly with files on your computer. That can be convenient, but choosing a broad folder gives the workflow a broader scope than selecting one disposable document. Decide which files the tool actually needs before opening the picker.

Start with a small working copy

Create a dedicated test folder containing a harmless copy. Keep original business files and backups outside it. Open the verified web application and select that folder through its normal file-opening command.

Read whether the browser is asking to view files or edit them. Chrome’s File System Access documentation distinguishes these permissions: an application may request additional write access when you save a change. Agree only to the scope required for the task you intend.

Where offered, distinguish access for the current visit from access on every visit. Chrome can retain file permissions, and installed web applications can have persistent access after a grant. Closing a browser tab is therefore not a universal permission-removal method.

Check an actual save and the exit route

Edit the disposable file with a distinctive test phrase, save it and reopen that same local file in a separate appropriate application. Confirm its location and contents. This establishes whether the editor changed the intended working copy rather than a similarly named download or cloud copy.

Inspect the site’s file-access controls through the address-bar information and site settings. Chrome documents a list of files and folders with granted access and a way to revoke individual entries. Remove the test folder’s access and check the next attempt to open or save it.

Revoking access affects future browser permission; it does not undo edits already written to the file or recall information a service already received. Read the application’s own data-handling description before using confidential material. Once the test works, choose the narrow real working folder and retain a separate backup before allowing important edits.

Sources: Chrome documentation.