Only the green options were enabled for the creation of this .pak file. Those that are in yellow are closely related, but still disabled like the rest.

Spoiler:  

Show

lyr_freighterTweaks.lua
plantGrowthRateMult: multiplies the plant growth rate by the given amount (setting to 2 will make every plant grow twice as fast)
unifiedPlantGrowthTime: unifies the plant growth times, value is in hours (setting to 4 will make every plant grow in 4 hours)
freighterBridgeScanner: adds the freighter planetary scan interaction to the bridge terminal
hangarSalvageTerminal: adds salvage terminals to the freighter hangar, below stairs
systemWideTelepads: adds two way freighter <-> station telepads which also work as regular transporters and can be used to call ship
interstellarTerminus: changes the regular transporter function of the added telepads to nexus one
useSolidRunwayTexture: changes the runway texture(s) to the old one (WARNING: very bright but also very noticable)
megaRunway: adds a mega runway to the freighter hangar entrance (not recommended with 'useSolidRunwayTexture')
megaRunwayLengthMult: separate multiplier value for the added mega runway's length
noMiniRunways: removes the mini (vanilla) runways from freighters (if having both the mini and mega runways is undesired)
miniRunwaysLengthMult: multiplier for the mini (vanilla) runway lengths (ideally, equal to mega's 'megaRunwayLengthMult' multiplier)
harvestDrone: adds 'harvest all' interaction to the 'Robotic Companion' decoration, and removes 'harvest all' sound
harvestDroneRadius: sets the added 'harvest all' interaction radius to the given value (render limitations will impose restrictions)
ownedShipsInHangar: sets the limit for owned ships in freighter hangar to the given value (minimum 1, game default is 6)
hangarDockingSpeedMult: dock and take off speed limits for freighters are adjusted by the given multiplier (above 3 not recommended)
hangarDockingOptimizations: speeds up hangar door animation and removes its sound along with a few other tweaks
noHangarPadRotation: hangar pad rotation is disabled; may eject as soon as pad is touched
noExteriorPlatformLight: removes the light spot in the middle of the exterior platforms (might look better if you are using a lot of these)
extendedFreighterBase: extends the buildable volume on the freighters
extendedFreighterConstruction: most things that can be built on a planetary base can also be built on freighters