title: Chrome has started blocking azure blob storage downloads
body: <p>Starting last Friday it appears that Google/Chrome has started blocking some types of Azure Blob storage downloads that are exposed using a shared access signature.</p>
  
  <p>Specifically, a PDF inside a ZIP file appears to generate the message that Chrome has blocked a dangerous file. </p>
  
  <p>The exact same file can be downloaded using a non-shared access signature link, although it will still given an "uncommon" file download warning.</p>
  
  <p>This happens when downloading from multiple blob storage accounts in multiple regions.</p>
  
  <p>Has anybody else experienced this issue? If so, how did you resolve it?</p>
  
  <p>Here is an example link. The first link is the direct download link, and the second is the shared access signature.</p>
  
  <p>Direct: <a href="https://ghsstoragetest.blob.core.windows.net/testfile.zip" rel="nofollow noreferrer">https://ghsstoragetest.blob.core.windows.net/testfile.zip</a></p>
  
  <p>SAS: <a href="https://ghsstoragetest.blob.core.windows.net/$root/testfile.zip?st=2019-06-17T18%3A15%3A08Z&amp;se=2020-06-18T18%3A15%3A00Z&amp;sp=rl&amp;sv=2018-03-28&amp;sr=b&amp;sig=LpgvNhL2dWLRo%2FB5iq2tvTR1dQcGLSDbtU6Yh7gV%2Bk4%3D" rel="nofollow noreferrer">https://ghsstoragetest.blob.core.windows.net/$root/testfile.zip?st=2019-06-17T18%3A15%3A08Z&amp;se=2020-06-18T18%3A15%3A00Z&amp;sp=rl&amp;sv=2018-03-28&amp;sr=b&amp;sig=LpgvNhL2dWLRo%2FB5iq2tvTR1dQcGLSDbtU6Yh7gV%2Bk4%3D</a></p>