<story><title>An even slimmer pdf.js</title><url>https://blog.mozilla.org/nnethercote/2014/06/16/an-even-slimmer-pdf-js/</url></story><parent_chain><item><author>annnnd</author><text>I don&amp;#x27;t want to sound negative and I certainly don&amp;#x27;t want to start a war here. I also really appreciate what Mozilla is doing and I am an otherwise happy user of FF on both desktop and mobile.&lt;p&gt;That said, FF memory usage (not just pdf.js) is sometimes just insane. Granted, I only have 2GB on this Linux, but FF invariably eats most of it (with just 10-20 tabs) if left running for long periods. Interestingly enough, once I restart FF and reopen the same tabs, memory usage is far lower. Memory leak? Inefficient caching? Who knows...&lt;p&gt;Every now and then there is a version of FF that claims to be using less memory, but in my experience the differences have been negligible. So as far I am concerned memory friendly FF is something like fast Java... I am still waiting to meet one of these beasts in the wild. :)</text></item></parent_chain><comment><author>nnethercote</author><text>Sorry to hear you&amp;#x27;re having problems. We need more data to take any kind of action. Are there particular sites that cause problems? Do you have any extensions installed?&lt;p&gt;Even better: can you visit about:memory and use the &amp;quot;Measure and save...&amp;quot; button to get a snapshot of memory usage when it gets high? You can then either email it to me or (preferably) file a bug at bugzilla.mozilla.org and CC me. Bugzilla can be intimidating, but don&amp;#x27;t worry too much about getting every field right. Just make sure the description is clear.&lt;p&gt;If all that is too hard (hopefully not!), you could try just resetting Firefox: &lt;a href=&quot;https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;support.mozilla.org&amp;#x2F;en-US&amp;#x2F;kb&amp;#x2F;reset-firefox-easily-fi...&lt;/a&gt;. That&amp;#x27;s not a guaranteed fix, but it does help in a lot of cases.</text></comment>
<story><title>An even slimmer pdf.js</title><url>https://blog.mozilla.org/nnethercote/2014/06/16/an-even-slimmer-pdf-js/</url></story><parent_chain><item><author>annnnd</author><text>I don&amp;#x27;t want to sound negative and I certainly don&amp;#x27;t want to start a war here. I also really appreciate what Mozilla is doing and I am an otherwise happy user of FF on both desktop and mobile.&lt;p&gt;That said, FF memory usage (not just pdf.js) is sometimes just insane. Granted, I only have 2GB on this Linux, but FF invariably eats most of it (with just 10-20 tabs) if left running for long periods. Interestingly enough, once I restart FF and reopen the same tabs, memory usage is far lower. Memory leak? Inefficient caching? Who knows...&lt;p&gt;Every now and then there is a version of FF that claims to be using less memory, but in my experience the differences have been negligible. So as far I am concerned memory friendly FF is something like fast Java... I am still waiting to meet one of these beasts in the wild. :)</text></item></parent_chain><comment><author>Ygg2</author><text>You can just use the latest Nightly or Aurora to see how fast these things are compared to yours. I had a same problem, Firefox being slow and clunky so I switched to Nightly and it did &lt;i&gt;really&lt;/i&gt; increase the speed.&lt;p&gt;I think Firefox is getting faster but fact is that users also acclimate to new speed and expect it to be faster.&lt;p&gt;EDIT: Right now with about 10 tabs open FF is eating around 580 MB of RAM.</text></comment>