Forget ALL from NOW – Extension

A lightweight extension for Vivaldi to delete all browser data in the time between two button clicks. It does not replace private windows but is a nice alternative if you e.g. don’t want to log out from a website but leave no traces of the time between the clicks on your computer.
You can download it below, but please read this post before you download and install it, because it can and will delete data and there is no undo.


  • Everything you did in the tab opened by the extension on the first click will be ERASED
  • Everything you did in ALL tabs SINCE the first button click will be ERASED.
  • Browser data that was stored BEFORE the first click will NOT be deleted.
  • Passwords you have stored during the time the extension was active will NOT be deleted.
  • Content from protectedWeb pages will NOT be deleted
    (learn more about protectedWeb pages)
  • The tab that opens automatically on the first click will be closed on the second click. Only that tab.
  • There will be an annoying tab that opens on first install install which explains this again.

Everything means all new entries in:

  • appcache
  • cache
  • cookies
  • downloads
  • fileSystems
  • formData
  • history
  • indexedDB
  • localStorage
  • serverBoundCertificates
  • pluginData
  • serviceWorkers
  • webSQL

ERASED means: No undo.

If you decide against deletion: Just don’t press the button but restart the browser. The extension resets itself with every restart. Alternatively you can Ctrl(Command on Mac)+Shift+9 to cancel, but that is buggy. Refer to the known issues in the “first install” tab of the extension.


If you think this extension fits to your workflow and if you can live with the caveats, download and save it to your drive where you can find it again.

File info:

To install you need to:

  • Unzip it
    (optionally rename to .zip if your unzipper doesn’t recognize .crx as .zip)
  • Look into the source to see that it is clean (optional)
  • Open vivaldi://extensions and switch to developer mode
  • Click the “load unpacked” button
  • Navigate to the folder where you have unzipped it
  • Click “OK”


If you find one you can keep it 😉 Nah, post them in the comments below and I’ll try to fix them (or ask someone who can help me fixing them)

The same goes for feature requests. If you are a good JavaScripter and know how to improve the extension: I take the code 😀

The comments are moderated, no thanks to some spammers, but I check them (almost) every day. No need to write them again, if you don’t see them immediately.


I am no experienced coder and you have now be warned about it, so USE AT YOUR OWN RISK!

Other than that: I tried to check for all cases and linted the code, but I can not guarantee that it e.g. doesn’t clash with other extensions or work as expected with the browser, doesn’t delete all data on your drive or even work at all on your machine.

PS: I totally forgot to

  • put malware into the extension
  • put a coin miner into the extension
  • rewrite all links to amazon and ebay to affiliate links
  • connect to external servers to pull other stuff in later
  • do any logging of any kind
  • do other nasty stuff that I have seen several times while checking extensions from the chrome web store

Leave a Reply

Your email address will not be published. Required fields are marked *