i decided to do a search for mentored bugs by searching according to this filter:
- Status: REOPENED, NEW, ASSIGNED, UNCONFIRMED
- Whiteboard: [mentor=
found this firefox bug:
Bug 681005 – Restore pinned tabs before normal tabs
without delay, I went straight to irc.mozilla.org to contact the mentor for more info. he (:zpao) led me to the code that needs fixing. it is located at https://mxr.mozilla.org/mozilla-central/source/browser/components/sessionstore/src/nsSessionStore.js#2731 all the way till line 2775.
i guess i got to spend some time staring at the code.