User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0 Build ID: 20170201180315 Steps to reproduce: I'm developing for hours, doing nothing special but having an intense debugger usage, to debug JS/HTML/NETWORKS requests, lot of F5, etc.. Actual results: I've 8go of RAM on my computer, it appears it's not sufficient to manage Firefox isage for a long time, i need hourly restart or the RAM usage increase dramatically... There it is, even if i work on the same page, even if it doesn't need huge memory (for scripts by example), and with cache disabled, the RAM will be full filled with "unknown" data or what i call "junk-data".. Expected results: Some garbage collector system should have clean old pages, or old RAM area.

Ok, one more precision, i've obviously disabled my "persistant log". Regards,

I think we'll need more memory details to better understand this. Could you attach memory reports for this? 1. Go to about:memory before your debugging work 2. Click "measure and save" to save a "before" memory report 3. Proceed with debugging (whatever seems to trigger the memory issue) 4. Go to about:memory again 5. Click "measure and save" to save an "after" memory report Attach these reports to the bug so that we can get a better idea of what's going on.

DevTools bug triage (filter on CLIMBING SHOES).

More data from the reporter is needed here. Please re-open if you're able to provide it.