Can't reopen sage rss feeds on startup

[CCF1]

Firefox - have "open my window and tabs from last visit" selected

issue only started occuring in last 2-3 versions of firefox - version ~40/41

have a number of tabs using sage rss feeds,

At shutdown of firefox/pc, sage rss feed loaded on number of tabs

On startup the next day: Firefox will not open the sage rss feed you last left on that tab (at shutdown) and will instead go to the last non-sage page you visited instead. (forward/newer or backward/older)

another similar issue,
if on a tab you have loaded

webpage 2 (newest)
webpage 1
google
sage rss
google (oldest)

if you are on "webpage 2" and go back to "sage rss" the tab still thinks its on "webpage 2" as that has a dot beside it