Continuously refreshing a tab after an interval leads to high memory consumption (400MB to 800MB in 30 seconds for 3 refreshes at 10 secs interval), why?

Environment:
MAC OSX 10.9.5
Firefox 32.0.3
Firefox keeps consuming lot of memory when you keep refreshing a tab after an interval.
I opened a single tab in my firefox and logged into my gmail account on that. At this stage the memory consumption was about 400MB. I refreshed the page after 10 seconds and it went to 580MB. Again i refreshed after 10 seconds and this time it was 690MB. Finally, when i refreshed 3rd time after 10 seconds, it was showing as 800MB.
Nothing was changed on the page (no new email, chat conversation, etc. nothing). Some how i feel that the firefox is not doing a good job at garbage collection. I tested this use case with lot of other applications and websites and got the similar result. Other browsers like Google chrome, safari, etc. they just work fine.
For one on of my application with three tabs open, the firefox literally crashed after the high memory consumption (around 2GB).
Can someone tell me if this is a known issue in firefox? and is firefox planning to fix it? Right now, is there any workaround or fix for this?

Hi FredMcD,
Thanks for the reply. Unfortunately, i don't see any crash reports in about:crashes. I am trying to reproduce the issue which will make browser to crash but somehow its not happening anymore but the browser gets stuck at a point. Here is what i am doing:
- 3 tabs are open with same page of my application. The page has several panels which has charts and the javascript libraries used for this page are backbone.js, underscore.js, require.js, highcharts.js
- The page automatically reloads after every 30 seconds
- After the first loading of there three tabs, the memory consumption is 600MB. But after 5 minutes, the memory consumption goes to 1.6GB and stays at this rate.
- After sometime, the page wont load completely for any of the tabs. At this stage the browser becomes very slow and i have to either hard refresh the tabs or restart the browser.

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