Can I install extensions on the Decentr browser?
You can absolutely install extensions. Decentr is based on Chromium, and therefore allows the installation of virtually all available extensions on the Chrome store.
We have had reports of certain extensions not functioning correctly, especially those that require locally installed software, such as KeePass, which specifically looks for the chrome.exe process to hook into. In such a case, it would be worth contacting the extension developer for assistance in using that extension with Decentr.