Question: Why does macOS need to verify LibreOffice each time after a restart? I haven't updated the app in a while, and after the first verification it opens normally the next time. This is annoying and it takes a long time (about a minute). This should happen once, after installing (in the /Applications folder), not repeatedly. This doesn't happen for other apps. 

[![Verifying Libreoffice App](https://i.stack.imgur.com/mLnnj.png)](https://i.stack.imgur.com/mLnnj.png)

**How can I make macOS stop verifying LO after a restart?**

NB: Saw the same happening to Firefox, but not Thunderbird and Evernote.

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**Update**

I installed this app several months ago. And I mention that this happens after a restart. So I don't open the app from a DMG, which would be unmounted after a restart anyways.

Answer: 
* <https://bugs.documentfoundation.org/show_bug.cgi?id=126409>

It is a bug filed on LibreOffice's tracker. So they're aware of it. Please do not flood the tracker with "me too" comments.
You still seem to start LibreOffice from the DMG file it was delivered in. Just drag the LibreOffice icon into your `/Applications` folder to install it properly. You can then eject and delete the DMG file.