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Download Chromium

You can test Chrome builds or Chromium builds. Chrome builds have the most
infrastructure for analyzing crashes and reporting bugs. They also auto-update
as new releases occur, which makes them a good choice for most uses. Chrome
Canary is available for Windows and
Mac and autoupdates daily. Other channels (dev
and beta) are available.

Chromium builds do not auto-update, and do not have symbols. This makes them
most useful for checking whether a claimed fix actually works. Use the following
instructions to find builds:

Open up https://download-chromium.appspot.com

1. Head to
   https://commondatastorage.googleapis.com/chromium-browser-snapshots/index.html
2. Choose your platform: Mac, Win, Linux, ChromiumOS
3. Pick the Chromium build number you’d like to use
   1. The latest one is mentioned in the LAST_CHANGE file
4. Download the zip file containing Chromium
5. There is a binary executable within to run

Let’s say you want a build of Chrome 44 for debugging purposes. Google does not
offer old builds as they do not have up-to-date security fixes.

However, you can get a build of Chromium 44.x which should mostly match the
stable release.

Here’s how you find it:

1. Look in
   https://googlechromereleases.blogspot.com/search/label/Stable updates
   for the last time “44.” was mentioned.
2. Loop up that version history (“44.0.2403.157”) in the Position
   Lookup
3. In this case it returns a base position of “330231”. This is the
   commit of where the 44 release was branched, back in May 2015.*
4. Open the continuous builds
   archive
5. Click through on your platform (Linux/Mac/Win)
6. Paste “330231” into the filter field at the top and wait for all the
   results to XHR in.
7. Eventually I get a perfect hit:
   https://commondatastorage.googleapis.com/chromium-browser-snapshots/index.html?prefix=Mac/330231/
   1. Sometimes you may have to decrement the commit number until you
      find one.
8. Download and run!

* As this build was made at 44 branch point, it does not have any commits
merged in while in beta.

Typically that’s OK, but if you need a true build of “44.0.2403.x” then you’ll
need to build Chromium from the 2403 branch. Some
PortableApps/PortableChromium sites offer binaries like this, due to security
concerns, the Chrome team does not recommend running them.