diff --git a/src/profile-logic/import/chrome.js b/src/profile-logic/import/chrome.js
index f9bcc6e735..92b874ae31 100644
--- a/src/profile-logic/import/chrome.js
+++ b/src/profile-logic/import/chrome.js
@@ -571,9 +571,20 @@ async function processTracingEvents(
           if (lineNumber === -1) {
             lineNumber = undefined;
           }
+
           if (columnNumber === -1) {
             columnNumber = undefined;
           }
+
+          // Line and column number are zero-based in chrome profiles, but
+          // 1-based in the firefox profiler.
+          if (lineNumber !== undefined) {
+            lineNumber++;
+          }
+          if (columnNumber !== undefined) {
+            columnNumber++;
+          }
+
           if (url === '') {
             url = undefined;
           }
diff --git a/src/test/unit/__snapshots__/profile-conversion.test.js.snap b/src/test/unit/__snapshots__/profile-conversion.test.js.snap
index 942d87f59a..9b27ebba3a 100644
--- a/src/test/unit/__snapshots__/profile-conversion.test.js.snap
+++ b/src/test/unit/__snapshots__/profile-conversion.test.js.snap
@@ -402777,14 +402777,14 @@ Object {
         ],
         "column": Array [
           null,
-          1757,
+          1758,
           null,
           null,
-          1363,
-          1783,
-          3420,
-          463,
-          1783,
+          1364,
+          1784,
+          3421,
+          464,
+          1784,
           null,
           null,
           null,
@@ -402793,14 +402793,14 @@ Object {
           null,
           null,
           null,
-          4543,
-          1326,
+          4544,
+          1327,
           null,
-          29,
+          30,
           null,
-          5197,
-          5375,
-          296,
+          5198,
+          5376,
+          297,
           null,
         ],
         "func": Array [
@@ -402891,14 +402891,14 @@ Object {
         "length": 26,
         "line": Array [
           null,
-          1,
+          2,
           null,
           null,
-          1,
-          25,
-          25,
-          1,
-          25,
+          2,
+          26,
+          26,
+          2,
+          26,
           null,
           null,
           null,
@@ -402907,14 +402907,14 @@ Object {
           null,
           null,
           null,
-          25,
-          28,
+          26,
+          29,
           null,
-          1,
+          2,
           null,
-          25,
-          25,
-          1,
+          26,
+          26,
+          2,
           null,
         ],
         "nativeSymbol": Array [
@@ -403005,13 +403005,13 @@ Object {
       "funcTable": Object {
         "columnNumber": Array [
           null,
-          1757,
+          1758,
           null,
           null,
-          1363,
-          1783,
-          3420,
-          463,
+          1364,
+          1784,
+          3421,
+          464,
           null,
           null,
           null,
@@ -403020,14 +403020,14 @@ Object {
           null,
           null,
           null,
-          4543,
-          1326,
+          4544,
+          1327,
           null,
-          29,
+          30,
           null,
-          5197,
-          5375,
-          296,
+          5198,
+          5376,
+          297,
           null,
         ],
         "fileName": Array [
@@ -403087,13 +403087,13 @@ Object {
         "length": 25,
         "lineNumber": Array [
           null,
-          1,
+          2,
           null,
           null,
-          1,
-          25,
-          25,
-          1,
+          2,
+          26,
+          26,
+          2,
           null,
           null,
           null,
@@ -403102,14 +403102,14 @@ Object {
           null,
           null,
           null,
-          25,
-          28,
+          26,
+          29,
           null,
-          1,
+          2,
           null,
-          25,
-          25,
-          1,
+          26,
+          26,
+          2,
           null,
         ],
         "name": Array [
@@ -444269,50 +444269,50 @@ Object {
         "column": Array [
           null,
           null,
-          32,
+          33,
           null,
           null,
           null,
           null,
           null,
-          22,
-          22,
-          16,
+          23,
+          23,
+          17,
           null,
-          34,
-          22,
-          20,
-          20,
-          26,
-          52,
-          29,
+          35,
+          23,
+          21,
+          21,
+          27,
+          53,
+          30,
           null,
           null,
           null,
+          26,
           25,
-          24,
           null,
-          37,
-          21,
-          32,
+          38,
+          22,
+          33,
           null,
           null,
           null,
-          16,
+          17,
           null,
           null,
-          16,
-          22,
-          20,
-          29,
-          18,
+          17,
+          23,
+          21,
           30,
-          18,
-          74,
-          24,
+          19,
+          31,
+          19,
+          75,
+          25,
           null,
-          30,
-          30,
+          31,
+          31,
           null,
         ],
         "func": Array [
@@ -444467,50 +444467,50 @@ Object {
         "line": Array [
           null,
           null,
-          3338,
+          3339,
           null,
           null,
           null,
           null,
           null,
-          75674,
-          75624,
-          65,
+          75675,
+          75625,
+          66,
           null,
-          70,
-          73232,
-          73084,
-          72908,
-          74574,
-          74061,
-          74281,
+          71,
+          73233,
+          73085,
+          72909,
+          74575,
+          74062,
+          74282,
           null,
           null,
           null,
-          27197,
-          27498,
+          27198,
+          27499,
           null,
-          26821,
-          27773,
-          28117,
+          26822,
+          27774,
+          28118,
           null,
           null,
           null,
-          137,
+          138,
           null,
           null,
-          32,
-          73232,
-          73084,
-          74281,
-          74613,
-          13073,
-          79762,
-          74085,
-          73822,
+          33,
+          73233,
+          73085,
+          74282,
+          74614,
+          13074,
+          79763,
+          74086,
+          73823,
           null,
-          13073,
-          13382,
+          13074,
+          13383,
           null,
         ],
         "nativeSymbol": Array [
@@ -444665,45 +444665,45 @@ Object {
         "columnNumber": Array [
           null,
           null,
-          32,
+          33,
           null,
           null,
           null,
           null,
-          22,
-          22,
-          16,
+          23,
+          23,
+          17,
           null,
-          34,
-          22,
-          20,
-          20,
-          26,
-          52,
-          29,
+          35,
+          23,
+          21,
+          21,
+          27,
+          53,
+          30,
           null,
           null,
           null,
           null,
+          26,
           25,
-          24,
           null,
-          37,
-          21,
-          32,
+          38,
+          22,
+          33,
           null,
           null,
           null,
-          16,
+          17,
           null,
           null,
-          16,
-          18,
-          30,
-          18,
-          74,
-          24,
-          30,
+          17,
+          19,
+          31,
+          19,
+          75,
+          25,
+          31,
         ],
         "fileName": Array [
           null,
@@ -444795,45 +444795,45 @@ Object {
         "lineNumber": Array [
           null,
           null,
-          3338,
+          3339,
           null,
           null,
           null,
           null,
-          75674,
-          75624,
-          65,
+          75675,
+          75625,
+          66,
           null,
-          70,
-          73232,
-          73084,
-          72908,
-          74574,
-          74061,
-          74281,
+          71,
+          73233,
+          73085,
+          72909,
+          74575,
+          74062,
+          74282,
           null,
           null,
           null,
           null,
-          27197,
-          27498,
+          27198,
+          27499,
           null,
-          26821,
-          27773,
-          28117,
+          26822,
+          27774,
+          28118,
           null,
           null,
           null,
-          137,
+          138,
           null,
           null,
-          32,
-          74613,
-          13073,
-          79762,
-          74085,
-          73822,
-          13382,
+          33,
+          74614,
+          13074,
+          79763,
+          74086,
+          73823,
+          13383,
         ],
         "name": Array [
           0,
@@ -447302,50 +447302,50 @@ Object {
         "column": Array [
           null,
           null,
-          32,
+          33,
           null,
           null,
           null,
           null,
           null,
-          22,
-          22,
-          16,
+          23,
+          23,
+          17,
           null,
-          34,
-          22,
-          20,
-          20,
-          26,
-          52,
-          29,
+          35,
+          23,
+          21,
+          21,
+          27,
+          53,
+          30,
           null,
           null,
           null,
+          26,
           25,
-          24,
           null,
-          37,
-          21,
-          32,
+          38,
+          22,
+          33,
           null,
           null,
           null,
-          16,
+          17,
           null,
           null,
-          16,
-          22,
-          20,
-          29,
-          18,
+          17,
+          23,
+          21,
           30,
-          18,
-          74,
-          24,
+          19,
+          31,
+          19,
+          75,
+          25,
           null,
-          30,
-          30,
+          31,
+          31,
           null,
         ],
         "func": Array [
@@ -447500,50 +447500,50 @@ Object {
         "line": Array [
           null,
           null,
-          3338,
+          3339,
           null,
           null,
           null,
           null,
           null,
-          75674,
-          75624,
-          65,
+          75675,
+          75625,
+          66,
           null,
-          70,
-          73232,
-          73084,
-          72908,
-          74574,
-          74061,
-          74281,
+          71,
+          73233,
+          73085,
+          72909,
+          74575,
+          74062,
+          74282,
           null,
           null,
           null,
-          27197,
-          27498,
+          27198,
+          27499,
           null,
-          26821,
-          27773,
-          28117,
+          26822,
+          27774,
+          28118,
           null,
           null,
           null,
-          137,
+          138,
           null,
           null,
-          32,
-          73232,
-          73084,
-          74281,
-          74613,
-          13073,
-          79762,
-          74085,
-          73822,
+          33,
+          73233,
+          73085,
+          74282,
+          74614,
+          13074,
+          79763,
+          74086,
+          73823,
           null,
-          13073,
-          13382,
+          13074,
+          13383,
           null,
         ],
         "nativeSymbol": Array [
@@ -447698,45 +447698,45 @@ Object {
         "columnNumber": Array [
           null,
           null,
-          32,
+          33,
           null,
           null,
           null,
           null,
-          22,
-          22,
-          16,
+          23,
+          23,
+          17,
           null,
-          34,
-          22,
-          20,
-          20,
-          26,
-          52,
-          29,
+          35,
+          23,
+          21,
+          21,
+          27,
+          53,
+          30,
           null,
           null,
           null,
           null,
+          26,
           25,
-          24,
           null,
-          37,
-          21,
-          32,
+          38,
+          22,
+          33,
           null,
           null,
           null,
-          16,
+          17,
           null,
           null,
-          16,
-          18,
-          30,
-          18,
-          74,
-          24,
-          30,
+          17,
+          19,
+          31,
+          19,
+          75,
+          25,
+          31,
         ],
         "fileName": Array [
           null,
@@ -447828,45 +447828,45 @@ Object {
         "lineNumber": Array [
           null,
           null,
-          3338,
+          3339,
           null,
           null,
           null,
           null,
-          75674,
-          75624,
-          65,
+          75675,
+          75625,
+          66,
           null,
-          70,
-          73232,
-          73084,
-          72908,
-          74574,
-          74061,
-          74281,
+          71,
+          73233,
+          73085,
+          72909,
+          74575,
+          74062,
+          74282,
           null,
           null,
           null,
           null,
-          27197,
-          27498,
+          27198,
+          27499,
           null,
-          26821,
-          27773,
-          28117,
+          26822,
+          27774,
+          28118,
           null,
           null,
           null,
-          137,
+          138,
           null,
           null,
-          32,
-          74613,
-          13073,
-          79762,
-          74085,
-          73822,
-          13382,
+          33,
+          74614,
+          13074,
+          79763,
+          74086,
+          73823,
+          13383,
         ],
         "name": Array [
           0,