Chromium / Google Chrome: Discard / freeze all tabs without closing (working in incognito mode as well)

01_REAME.md

Discard all tabs in Google Chrome / Chromium

Why?

There are multiple extensions that claim to do this, but I didn't find one that was working in incognito mode.

Steps:

1. Go to chrome://discards/
2. Open the DevTools and click on the Console tab (or press [Esc])
3. Paste whole script and execute it (by pressing [Enter])
4. Observe that all tabs (excluding the current one) have their Lifecycle State changed to "discarded (urgent) at <time>"
5. Profit!

02_dev_tools_script.js

function discardAllTabs() {
  const tbl = document
    .querySelector("body > discards-main")
    .shadowRoot.querySelector("iron-pages > discards-tab")
    .shadowRoot.querySelector("#tab-discards-info-table-body");
  if ((tbl?.childElementCount ?? 0) === 0) {
    console.log("Error: '#tab-discards-info-table-body' not found.");
    console.log(tbl?.childElementCount ?? 0, tbl?.childElementCount, tbl);
    return;
  }
  let discardedTabsCount = 0;
  for (const row of tbl.children) {
    if (row.childElementCount != 12) continue;
    const title = row.children[3].innerText;
    if (
      (title.match(/Discards/gi)?.length ?? 0) > 0 ||
      (title.match(/Dev *Tools/gi)?.length ?? 0) > 0
    ) {
      console.log(`Skipping tab '${title}'`);
      continue;
    }
    console.log(`Discarding tab: '${title}'`);
    row.children[11].children[1].click();
    discardedTabsCount++;
  }
  return {
    discardedTabsCount,
    tableRowsCount: tbl.childElementCount,
  };
}
discardAllTabs()