diff --git a/README-mozilla.txt b/README-mozilla.txt
index 70efb5dc..ebb86e6e 100644
--- a/README-mozilla.txt
+++ b/README-mozilla.txt
@@ -77,16 +77,6 @@ int jpeg_c_get_int_param (j_compress_ptr cinfo, J_INT_PARAM param)
 Boolean Extension Parameters Supported by mozjpeg
 -------------------------------------------------
 
-* JBOOLEAN_USE_MOZ_DEFAULTS (default: TRUE)
-  This parameter controls the behavior of the jpeg_set_defaults() function and
-  should thus be set prior to calling that function.  If this parameter is
-  TRUE, then jpeg_set_defaults() will configure the library to use the mozjpeg
-  defaults (which will enable settings that increase the compression ratio as
-  much as possible, at the expense of increased encoding time.)  If this
-  parameter is FALSE, then jpeg_set_defaults() will configure the library to
-  use the libjpeg[-turbo] defaults (baseline entropy coding, no mozjpeg
-  extensions enabled.)
-
 * JBOOLEAN_OPTIMIZE_SCANS (default: TRUE)
   Specifies whether scan parameters should be optimized.  Parameter
   optimization is done as in jpgcrush. jpeg_simple_progression() should be called
@@ -145,6 +135,22 @@ Floating Point Extension Parameters Supported by mozjpeg
 Integer Extension Parameters Supported by mozjpeg
 -------------------------------------------------
 
+* JINT_COMPRESS_PROFILE (default: JCP_MAX_COMPRESSION)
+  Select a compression profile, which is a set of default parameters that will
+  achieve a desired compression goal.  This parameter controls the behavior of
+  the jpeg_set_defaults() function.  Thus, setting JINT_COMPRESS_PROFILE does
+  not cause any other parameters to be modified until jpeg_set_defaults() is
+  called.  The following compression profiles are supported:
+
+  - JCP_MAX_COMPRESSION (default)
+    Increase the compression ratio as much as possible, at the expense of
+    increased encoding time.  This enables progressive entropy coding and all
+    mozjpeg extensions.
+
+  - JCP_FASTEST
+    Use the libjpeg[-turbo] defaults (baseline entropy coding, no mozjpeg
+    extensions enabled.)
+
 * JINT_TRELLIS_FREQ_SPLIT (default: 8)
   Specifies the position within the zigzag scan at which the split between
   scans is positioned in the context of trellis quantization.
diff --git a/cjpeg.c b/cjpeg.c
index 2054ae8e..41558a79 100644
--- a/cjpeg.c
+++ b/cjpeg.c
@@ -480,7 +480,7 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 
     } else if (keymatch(arg, "revert", 3)) {
       /* revert to old JPEG default */
-      jpeg_c_set_bool_param(cinfo, JBOOLEAN_USE_MOZ_DEFAULTS, FALSE);
+      jpeg_c_set_int_param(cinfo, JINT_COMPRESS_PROFILE, JCP_FASTEST);
       jpeg_set_defaults(cinfo);
 
     } else if (keymatch(arg, "sample", 2)) {
diff --git a/jcapimin.c b/jcapimin.c
index 8935546b..804e347f 100644
--- a/jcapimin.c
+++ b/jcapimin.c
@@ -99,7 +99,7 @@ jpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize)
   cinfo->master = (struct jpeg_comp_master *)
       jpeg_get_small ((j_common_ptr) cinfo, sizeof(struct jpeg_comp_master));
   MEMZERO(cinfo->master, sizeof(struct jpeg_comp_master));
-  cinfo->master->use_moz_defaults = TRUE;
+  cinfo->master->compress_profile = JCP_MAX_COMPRESSION;
 }
 
 
diff --git a/jccompat.c b/jccompat.c
index 6a7f1c33..30ec3a4f 100644
--- a/jccompat.c
+++ b/jccompat.c
@@ -19,7 +19,6 @@ GLOBAL(boolean)
 jpeg_c_bool_param_supported (j_compress_ptr cinfo, J_BOOLEAN_PARAM param)
 {
   switch (param) {
-  case JBOOLEAN_USE_MOZ_DEFAULTS:
   case JBOOLEAN_OPTIMIZE_SCANS:
   case JBOOLEAN_TRELLIS_QUANT:
   case JBOOLEAN_TRELLIS_QUANT_DC:
@@ -40,9 +39,6 @@ jpeg_c_set_bool_param (j_compress_ptr cinfo, J_BOOLEAN_PARAM param,
                        boolean value)
 {
   switch(param) {
-  case JBOOLEAN_USE_MOZ_DEFAULTS:
-    cinfo->master->use_moz_defaults = value;
-    break;
   case JBOOLEAN_OPTIMIZE_SCANS:
     cinfo->master->optimize_scans = value;
     break;
@@ -77,8 +73,6 @@ GLOBAL(boolean)
 jpeg_c_get_bool_param (j_compress_ptr cinfo, J_BOOLEAN_PARAM param)
 {
   switch(param) {
-  case JBOOLEAN_USE_MOZ_DEFAULTS:
-    return cinfo->master->use_moz_defaults;
   case JBOOLEAN_OPTIMIZE_SCANS:
     return cinfo->master->optimize_scans;
   case JBOOLEAN_TRELLIS_QUANT:
@@ -152,6 +146,7 @@ GLOBAL(boolean)
 jpeg_c_int_param_supported (j_compress_ptr cinfo, J_INT_PARAM param)
 {
   switch (param) {
+  case JINT_COMPRESS_PROFILE:
   case JINT_TRELLIS_FREQ_SPLIT:
   case JINT_TRELLIS_NUM_LOOPS:
   case JINT_BASE_QUANT_TBL_IDX:
@@ -167,6 +162,16 @@ GLOBAL(void)
 jpeg_c_set_int_param (j_compress_ptr cinfo, J_INT_PARAM param, int value)
 {
   switch (param) {
+  case JINT_COMPRESS_PROFILE:
+    switch (value) {
+    case JCP_MAX_COMPRESSION:
+    case JCP_FASTEST:
+      cinfo->master->compress_profile = value;
+      break;
+    default:
+      ERREXIT(cinfo, JERR_BAD_PARAM_VALUE);
+    }
+    break;
   case JINT_TRELLIS_FREQ_SPLIT:
     cinfo->master->trellis_freq_split = value;
     break;
@@ -190,6 +195,8 @@ GLOBAL(int)
 jpeg_c_get_int_param (j_compress_ptr cinfo, J_INT_PARAM param)
 {
   switch (param) {
+  case JINT_COMPRESS_PROFILE:
+    return cinfo->master->compress_profile;
   case JINT_TRELLIS_FREQ_SPLIT:
     return cinfo->master->trellis_freq_split;
   case JINT_TRELLIS_NUM_LOOPS:
diff --git a/jcparam.c b/jcparam.c
index b6c491df..9b68761b 100644
--- a/jcparam.c
+++ b/jcparam.c
@@ -417,19 +417,9 @@ jpeg_set_defaults (j_compress_ptr cinfo)
     cinfo->arith_ac_K[i] = 5;
   }
 
-#ifdef C_PROGRESSIVE_SUPPORTED
-  cinfo->scan_info = NULL;
-  cinfo->num_scans = 0;
-  if (!cinfo->master->use_moz_defaults) {
-    /* Default is no multiple-scan output */
-    cinfo->scan_info = NULL;
-    cinfo->num_scans = 0;
-  }
-#else
   /* Default is no multiple-scan output */
   cinfo->scan_info = NULL;
   cinfo->num_scans = 0;
-#endif
 
   /* Expect normal source image, not raw downsampled data */
   cinfo->raw_data_in = FALSE;
@@ -438,7 +428,7 @@ jpeg_set_defaults (j_compress_ptr cinfo)
   cinfo->arith_code = FALSE;
 
 #ifdef ENTROPY_OPT_SUPPORTED
-  if (cinfo->master->use_moz_defaults)
+  if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION)
     /* By default, do extra passes to optimize entropy coding */
     cinfo->optimize_coding = TRUE;
   else
@@ -465,7 +455,8 @@ jpeg_set_defaults (j_compress_ptr cinfo)
   cinfo->do_fancy_downsampling = TRUE;
 #endif
 
-  cinfo->master->overshoot_deringing = cinfo->master->use_moz_defaults;
+  cinfo->master->overshoot_deringing =
+    cinfo->master->compress_profile == JCP_MAX_COMPRESSION;
 
   /* No input smoothing */
   cinfo->smoothing_factor = 0;
@@ -499,14 +490,15 @@ jpeg_set_defaults (j_compress_ptr cinfo)
   cinfo->master->dc_scan_opt_mode = 1;
   
 #ifdef C_PROGRESSIVE_SUPPORTED
-  if (cinfo->master->use_moz_defaults) {
+  if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
     cinfo->master->optimize_scans = TRUE;
     jpeg_simple_progression(cinfo);
   } else
     cinfo->master->optimize_scans = FALSE;
 #endif
   
-  cinfo->master->trellis_quant = cinfo->master->use_moz_defaults;
+  cinfo->master->trellis_quant =
+    cinfo->master->compress_profile == JCP_MAX_COMPRESSION;
   cinfo->master->lambda_log_scale1 = 14.75;
   cinfo->master->lambda_log_scale2 = 16.5;
   cinfo->master->quant_tbl_master_idx = 3;
@@ -877,7 +869,7 @@ jpeg_simple_progression (j_compress_ptr cinfo)
     nscans = 10;
   } else {
     /* All-purpose script for other color spaces. */
-    if (cinfo->master->use_moz_defaults == TRUE) {
+    if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
       if (ncomps > MAX_COMPS_IN_SCAN)
         nscans = 5 * ncomps;      /* 2 DC + 4 AC scans per component */
       else
@@ -909,7 +901,7 @@ jpeg_simple_progression (j_compress_ptr cinfo)
 
   if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
     /* Custom script for YCbCr color images. */
-    if (cinfo->master->use_moz_defaults == TRUE) {
+    if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
       /* scan defined in jpeg_scan_rgb.txt in jpgcrush */
     /* Initial DC scan */
       if (cinfo->master->dc_scan_opt_mode == 0)
@@ -957,7 +949,7 @@ jpeg_simple_progression (j_compress_ptr cinfo)
     }
   } else {
     /* All-purpose script for other color spaces. */
-    if (cinfo->master->use_moz_defaults == TRUE) {
+    if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
       /* scan defined in jpeg_scan_bw.txt in jpgcrush */
       /* DC component, no successive approximation */
       scanptr = fill_dc_scans(scanptr, ncomps, 0, 0);
diff --git a/jerror.h b/jerror.h
index 816fdf9a..cb5d6f84 100644
--- a/jerror.h
+++ b/jerror.h
@@ -208,6 +208,7 @@ JMESSAGE(JWRN_ARITH_BAD_CODE, "Corrupt JPEG data: bad arithmetic code")
 #endif
 #endif
 JMESSAGE(JERR_BAD_PARAM, "Bogus parameter")
+JMESSAGE(JERR_BAD_PARAM_VALUE, "Bogus parameter value")
 
 #ifdef JMAKE_ENUM_LIST
 
diff --git a/jpegint.h b/jpegint.h
index 49de57ed..36c5e409 100644
--- a/jpegint.h
+++ b/jpegint.h
@@ -58,7 +58,6 @@ struct jpeg_comp_master {
   boolean is_last_pass;         /* True during last pass */
 
   /* Extension parameters */
-  boolean use_moz_defaults; /* TRUE=use Mozilla defaults */
   boolean optimize_scans; /* TRUE=optimize progressive coding scans */
   boolean trellis_quant; /* TRUE=use trellis quantization */
   boolean trellis_quant_dc; /* TRUE=use trellis quant for DC coefficient */
@@ -72,6 +71,7 @@ struct jpeg_comp_master {
   double norm_src[NUM_QUANT_TBLS][DCTSIZE2];
   double norm_coef[NUM_QUANT_TBLS][DCTSIZE2];
 
+  int compress_profile; /* compression profile */
   int dc_scan_opt_mode; /* DC scan optimization mode */
   int quant_tbl_master_idx; /* Quantization table master index */
   int trellis_freq_split; /* splitting point for frequency in trellis quantization */
diff --git a/jpeglib.h b/jpeglib.h
index 1b95a36e..be895a96 100644
--- a/jpeglib.h
+++ b/jpeglib.h
@@ -274,7 +274,6 @@ typedef enum {
 /* Boolean extension parameters */
 
 typedef enum {
-  JBOOLEAN_USE_MOZ_DEFAULTS = 0xAE2F5D7F, /* TRUE=use Mozilla defaults */
   JBOOLEAN_OPTIMIZE_SCANS = 0x680C061E, /* TRUE=optimize progressive coding scans */
   JBOOLEAN_TRELLIS_QUANT = 0xC5122033, /* TRUE=use trellis quantization */
   JBOOLEAN_TRELLIS_QUANT_DC = 0x339D4C0C, /* TRUE=use trellis quant for DC coefficient */
@@ -295,6 +294,7 @@ typedef enum {
 /* Integer parameters */
 
 typedef enum {
+  JINT_COMPRESS_PROFILE = 0xE9918625, /* compression profile */
   JINT_TRELLIS_FREQ_SPLIT = 0x6FAFF127, /* splitting point for frequency in trellis quantization */
   JINT_TRELLIS_NUM_LOOPS = 0xB63EBF39, /* number of trellis loops */
   JINT_BASE_QUANT_TBL_IDX = 0x44492AB1, /* base quantization table index */
@@ -302,6 +302,14 @@ typedef enum {
 } J_INT_PARAM;
 
 
+/* Values for the JINT_COMPRESS_PROFILE parameter (32-bit GUIDs) */
+
+enum {
+  JCP_MAX_COMPRESSION = 0x5D083AAD, /* best compression ratio (progressive, all mozjpeg extensions) */
+  JCP_FASTEST = 0x2AEA5CB4 /* libjpeg[-turbo] defaults (baseline, no mozjpeg extensions) */
+};
+
+
 /* Common fields between JPEG compression and decompression master structs. */
 
 #define jpeg_common_fields \
diff --git a/jpegtran.c b/jpegtran.c
index 782c4732..e5161c4b 100644
--- a/jpegtran.c
+++ b/jpegtran.c
@@ -44,7 +44,7 @@ static const char * progname;   /* program name for error messages */
 static char * outfilename;      /* for -outfile switch */
 static JCOPY_OPTION copyoption; /* -copy switch */
 static jpeg_transform_info transformoption; /* image transformation options */
-boolean memsrc;  /* for -memsrc switch */
+boolean memsrc = FALSE;  /* for -memsrc switch */
 #define INPUT_BUF_SIZE  4096
 
 
@@ -316,7 +316,7 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 
     } else if (keymatch(arg, "revert", 3)) {
       /* revert to old JPEG default */
-      jpeg_c_set_bool_param(cinfo, JBOOLEAN_USE_MOZ_DEFAULTS, FALSE);
+      jpeg_c_set_int_param(cinfo, JINT_COMPRESS_PROFILE, JCP_FASTEST);
       
     } else if (keymatch(arg, "rotate", 2)) {
       /* Rotate 90, 180, or 270 degrees (measured clockwise). */
@@ -474,8 +474,10 @@ main (int argc, char **argv)
 #endif
 
   /* Specify data source for decompression */
-  if (jpeg_c_bool_param_supported(&dstinfo, JBOOLEAN_USE_MOZ_DEFAULTS))
-    memsrc = jpeg_c_get_bool_param(&dstinfo, JBOOLEAN_USE_MOZ_DEFAULTS); /* needed to revert to original */
+  if (jpeg_c_int_param_supported(&dstinfo, JINT_COMPRESS_PROFILE) &&
+      jpeg_c_get_int_param(&dstinfo, JINT_COMPRESS_PROFILE)
+        == JCP_MAX_COMPRESSION)
+    memsrc = TRUE; /* needed to revert to original */
 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
   if (memsrc) {
     size_t nbytes;
@@ -561,8 +563,9 @@ main (int argc, char **argv)
 
   /* Specify data destination for compression */
 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
-  if (jpeg_c_bool_param_supported(&dstinfo, JBOOLEAN_USE_MOZ_DEFAULTS) &&
-      jpeg_c_get_bool_param(&dstinfo, JBOOLEAN_USE_MOZ_DEFAULTS))
+  if (jpeg_c_int_param_supported(&dstinfo, JINT_COMPRESS_PROFILE) &&
+      jpeg_c_get_int_param(&dstinfo, JINT_COMPRESS_PROFILE)
+        == JCP_MAX_COMPRESSION)
     jpeg_mem_dest(&dstinfo, &outbuffer, &outsize);
   else
 #endif
@@ -584,8 +587,9 @@ main (int argc, char **argv)
   /* Finish compression and release memory */
   jpeg_finish_compress(&dstinfo);
   
-  if (jpeg_c_bool_param_supported(&dstinfo, JBOOLEAN_USE_MOZ_DEFAULTS) &&
-      jpeg_c_get_bool_param(&dstinfo, JBOOLEAN_USE_MOZ_DEFAULTS)) {
+  if (jpeg_c_int_param_supported(&dstinfo, JINT_COMPRESS_PROFILE) &&
+      jpeg_c_get_int_param(&dstinfo, JINT_COMPRESS_PROFILE)
+        == JCP_MAX_COMPRESSION) {
     size_t nbytes;
     
     unsigned char *buffer = outbuffer;
diff --git a/turbojpeg.c b/turbojpeg.c
index 7617ef8b..4d625c8c 100644
--- a/turbojpeg.c
+++ b/turbojpeg.c
@@ -240,7 +240,7 @@ static int setCompDefaults(struct jpeg_compress_struct *cinfo,
 	else jpeg_set_colorspace(cinfo, JCS_YCbCr);
 
 	/* Set scan pattern again as colorspace might have changed */
-	if (cinfo->master->use_moz_defaults)
+	if(cinfo->master->compress_profile == JCP_MAX_COMPRESSION)
 		jpeg_simple_progression(cinfo);
 
 	cinfo->comp_info[0].h_samp_factor=tjMCUWidth[subsamp]/8;