There's good news and bad news. First, the bad news is that it appears to be positioned beside the window instead of in front of the source of sunlight, in which position it would "park" instead of grow. Leaves are not forever. They last some length of time, something less than a year for Figs, and would normally be replaced a few at a time by growing new clusters at the branch terminals (ends). Sunlight of some strength is needed for that and the best situation is to be out of the house for the summer, generating a whole new canopy which would last all winter in the house in front of a good window.
Unfortunately, your leaves would seem to be on the used-up side of the scale at the end of this outdoor growing season. The tree should have been put outdoors in April, or when nighttime temperatures are above 50°F, where you are and you would now be starting the process of acclimating it to interior light conditions by moving it from full sun to half day sun to dappled shade to full shade over a 4 to 6 week period so it wouldn't lose all its leaves when finally brought into the house. In fact, the best way to insure that all the leaves are less than one year old and will last one whole winter indoors is to completely defoliate the tree when you set it out in full sun by first cutting all the leaves off at the base of the leaf leaving the petiole attached to the branch, then cutting off the bud at the tips of every branch, encouraging back-budding or new leaves to grow in the interior, making the plant dense and compact and keeping it approximately the same size.
After it grew a whole new canopy of leaves you would re-pot it, in May or June, at least every other year, or every year if you're ambitious. You would feed it at label strength with any liquid fertilizer twice a month in the growing months, only, ~April thru September.
The good news is that you're in Alabama and you still have a little growing season left. Cut off the leaf and the bud in its axil at the ends of every branch and put it outside in dappled shade and bring it indoors any time the temperature will dip below 50°F. That will get you some regeneration of energy and some new, interior leaves. Not enough to look primo all winter, in front of a window, but enough to bridge until next April when you begin the proper, full-tilt boogie regimen. There are lesser methods producing lesser results which other here may outline, but I'm a full-tilt boogie kind of guy.