1. Software accessed via an online browser → WEBAPP
2. Game-tying goal → EVENER
3. Healthier version of a breakfast side dish → VEGGIEBACON
4. "Or ___ what?" → ELSE
5. Longtime NASCAR sponsor → STP
6. Alters the shape of → WARPS
7. Dell competitor → ACER
8. Singer Amos → TORI
9. "You can say that again!" → AMEN
10. Sensitivity → TACT
11. Secret identity of Don Diego de la Vega → ZORRO
12. Ax, so to speak → END
13. Beehive State athlete → UTE
14. Grassy section → SOD
20. Source of 3.5 million quotations, for short → OED
22. Performer of the 1992 dance song "Supermodel (You Better Work)" → RUPAUL
26. Greek figures with multiple heads → HYDRAS
28. Status of 23-, 44- and 69-Across, as indicated by their clues and placement in the grid → UNDERREPAIR
29. Trampoline mats → BEDS
30. Elf product → TOY
32. Org. opposed to "speciesism" → PETA
33. Common street sign symbol → ARROW
34. Several things in a pagoda → TIERS
35. Party starters, in brief → MCS
36. Sowing machine → SEEDER
40. "To your health!," in Germany → PROSIT
41. ___ gaz (carbonated: Fr.) → AVEC
42. [Don't open this at the office!] → NSFW
43. One of four rhyming letters → ETA
44. Modern prefix with village → ECO
49. "The Matrix" character, with "the" → ORACLE
50. Nuts → WACKOS
52. Standing → ERECT
53. Aachen article → DAS
54. "There is more to life than increasing its ___": Gandhi → SPEED
57. Some needle work, in brief → TATS
58. "Community" character played by Donald Glover → TROY
59. Apt letters missing from _ _stra_ _ → REIN
60. Songwriter Guthrie → ARLO
62. ___ Minor → URSA
63. Fire up → REV
64. Prize that a prospector pries → ORE
65. Sloth, e.g. → SIN
66. Some N.F.L. linemen → DTS