Match more Firefox-internal locations (#156)

Looks like Firefox also generates locations with names like
`bound (self-hosted:951:0)`. We check for `self-hosted`, but not for
`self-hosted` with stuff after it following a colon. We should ignore
these too, otherwise we can end up with stuff on our stack that we don't
expect. This was causing Firefox profiles not to load because we
completed building the profile with a non-empty stack.

Attached is a profile that errors without this patch and successfully renders
with this patch.

[copy.json.zip](https://github.com/jlfwong/speedscope/files/2350583/copy.json.zip)

src/import/__snapshots__/firefox.test.ts.snap

@@ -59,6 +59,70 @@ Object {
 }
 `;
 
+exports[`importFromFirefox ignore self-hosted 1`] = `
+Object {
+  "frames": Array [
+    Frame {
+      "col": undefined,
+      "file": "http://localhost:8000/simple.js:1",
+      "key": "alpha (http://localhost:8000/simple.js:1:14)",
+      "line": 14,
+      "name": "alpha",
+      "selfWeight": 0,
+      "totalWeight": 26.983816999942064,
+    },
+    Frame {
+      "col": undefined,
+      "file": "http://localhost:8000/simple.js:14",
+      "key": "delta (http://localhost:8000/simple.js:14:14)",
+      "line": 14,
+      "name": "delta",
+      "selfWeight": 0,
+      "totalWeight": 11.946324001066387,
+    },
+    Frame {
+      "col": undefined,
+      "file": "http://localhost:8000/simple.js:20",
+      "key": "gamma (http://localhost:8000/simple.js:20:14)",
+      "line": 14,
+      "name": "gamma",
+      "selfWeight": 26.983816999942064,
+      "totalWeight": 26.983816999942064,
+    },
+    Frame {
+      "col": undefined,
+      "file": "http://localhost:8000/simple.js:8",
+      "key": "beta (http://localhost:8000/simple.js:8:13)",
+      "line": 13,
+      "name": "beta",
+      "selfWeight": 0,
+      "totalWeight": 15.037492998875678,
+    },
+  ],
+  "name": "simple-firefox.json",
+  "stacks": Array [
+    "alpha;delta;gamma 999.57µs",
+    "alpha;beta;gamma 2.01ms",
+    "alpha;delta;gamma 1.00ms",
+    "alpha;beta;gamma 995.68µs",
+    "alpha;delta;gamma 996.27µs",
+    "alpha;beta;gamma 4.01ms",
+    "alpha;delta;gamma 2.02ms",
+    "alpha;beta;gamma 959.44µs",
+    "alpha;delta;gamma 2.01ms",
+    "alpha;beta;gamma 4.01ms",
+    "alpha;delta;gamma 959.28µs",
+    "alpha;beta;gamma 2.03ms",
+    "alpha;delta;gamma 3.96ms",
+    "alpha;beta;gamma 1.02ms",
+  ],
+}
+`;
+
+exports[`importFromFirefox ignore self-hosted: indexToView 1`] = `0`;
+
+exports[`importFromFirefox ignore self-hosted: profileGroup.name 1`] = `"simple-firefox.json"`;
+
 exports[`importFromFirefox recursion 1`] = `
 Object {
   "frames": Array [

src/import/firefox.test.ts

@@ -7,3 +7,7 @@ test('importFromFirefox', async () => {
 test('importFromFirefox recursion', async () => {
   await checkProfileSnapshot('./sample/profiles/Firefox/61/recursion.json')
 })
+
+test('importFromFirefox ignore self-hosted', async () => {
+  await checkProfileSnapshot('./sample/profiles/Firefox/63/simple-firefox.json')
+})

src/import/firefox.ts

@@ -180,7 +180,11 @@ export function importFromFirefox(firefoxProfile: FirefoxProfile): Profile {
 
         if (!match) return null
 
-        if (match[2].startsWith('resource:') || match[2] === 'self-hosted') {
+        if (
+          match[2].startsWith('resource:') ||
+          match[2] === 'self-hosted' ||
+          match[2].startsWith('self-hosted:')
+        ) {
           // Ignore Firefox-internals stuff
           return null
         }