Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

On Monday the 3rd of March, around 5pm UTC (9am PT) users may experience a brief period of downtime while one of our underlying services is under maintenance.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

pdf.js eats a lot of memory

  • 1 cavab
  • 7 have this problem
  • 31 views
  • Last reply by lizhenry

more options

I have five pdf files open in my browser each being size of ~ 1 MB => 5 MB. (Looked up by downloading them) Yet, pdf.js uses combined 457 MB of RAM (162 + 132 + 70 + 56 + 23 MB) to display these documents. Needless to say, a 100 MB or so pdf opened with pdf.js stalls the whole browser completely. I find the massive 100 times the pdf size use of memory weird. Leak somewhere or what?

I have five pdf files open in my browser each being size of ~ 1 MB => 5 MB. (Looked up by downloading them) Yet, pdf.js uses combined 457 MB of RAM (162 + 132 + 70 + 56 + 23 MB) to display these documents. Needless to say, a 100 MB or so pdf opened with pdf.js stalls the whole browser completely. I find the massive 100 times the pdf size use of memory weird. Leak somewhere or what?

Chosen solution

It looks like there are existing bugs for this issue: https://bugzilla.mozilla.org/show_bug.cgi?id=881974 and https://bugzilla.mozilla.org/show_bug.cgi?id=868949. So there are developers working on the issue.

As a workaround, if you need to, you could try using another viewer:

https://support.mozilla.org/en-US/kb/disable-built-pdf-viewer-and-use-another-viewer

Read this answer in context 👍 2

All Replies (1)

more options

Seçilmiş Həll

It looks like there are existing bugs for this issue: https://bugzilla.mozilla.org/show_bug.cgi?id=881974 and https://bugzilla.mozilla.org/show_bug.cgi?id=868949. So there are developers working on the issue.

As a workaround, if you need to, you could try using another viewer:

https://support.mozilla.org/en-US/kb/disable-built-pdf-viewer-and-use-another-viewer