Vessio decrypts in your browser and writes straight to disk. How far that goes depends on the browser engine; these are the measured limits, not guesses.
| Browser | How downloads work | Limit |
|---|---|---|
| Chrome, Edge, Brave, Opera (Chromium) | Streams to a file you pick; interrupted downloads resume at the last complete part. | No limit from the browser. |
| Firefox | Staged in the browser's private storage (resumable), then handed to the download manager. | Bounded by that storage's quota, about 10 GB per file on most machines. |
| Safari | Streamed through a service worker to a normal download; memory stays flat. | Verified to 4 GB per file. No resume: keep the tab open until the download finishes. |
Above these limits, use a Chromium browser.
Uploads resume in every engine; a closed tab picks up where it left off when you select the same files again.
Measured on Chromium 153, Firefox 155 and WebKit 26.6 during the phase 0 spikes (ADR 0004).