I just checked the standing after 12 games
After the victory against Philly, we're just one game behind them. We have five games in future(https://ca.sports.yahoo.com/nfl/teams/san-francisco/schedule), and playing at Baltimore on Christmas may be a tough one.
Seems that Eagle's schedule is easier in the last month. (https://ca.sports.yahoo.com/nfl/teams/philadelphia/schedule)
If my understanding is correct (https://operations.nfl.com/the-rules/nfl-tie-breaking-procedures/), we have the head-to-head advantage, so if Eagle lose one more game, we'll have the opportunity for the home-game priority.
When it comes to NFC west, the situation is more pleasing.
After Seattle's loss, we have three game advantage.