User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
Steps to reproduce:
Memory usage can easily go above 2GB when decoding on load and after paging. Seems to be released after some delay/unspecified event.
Memory usage should not increase a lot when decoding.
PDF decodes without memory problems in Chromium 73, Okular 1.6.3.