fix: removed manifest for experimental build

[NidhiKJha]

Since we have updated the manifest for main directly, we don't need a manifest for experimental. Also, this is breaking the FF behaviour because sidepanel is added directly for experimental manifest

Changelog

CHANGELOG entry:null

Related issues

Fixes:

Manual testing steps

1. Everything should work in both experimental and main builds for FF and chrome

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

---

Note

Removes the experimental build manifest to rely on the main manifest and avoid duplicate side panel config.

• Deletes app/build-types/experimental/manifest/_base.json, which specified permissions: ["sidePanel"] and side_panel.default_path

^{Written by Cursor Bugbot for commit bb192f4. This will update automatically on new commits. Configure here.}

[metamaskbotv2]

Builds ready [0bc73ce]

• builds: chrome, firefox
• builds (beta): chrome, firefox
• builds (flask): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• bundle size: Bundle Size Stats
• user-actions-benchmark: User Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
  • content-script: 0
  • offscreen: 0

UI Startup Metrics (1277 ± 117 ms)

Platform	BuildType	Page	Metric	Mean (ms)	Min (ms)	Max (ms)	Std Dev (ms)	P 75 (ms)	P 95 (ms)
Chrome	Browserify	Standard Home	uiStartup	1277	1022	1735	117	1334	1476
			load	1074	865	1419	105	1127	1266
			domContentLoaded	1068	858	1416	104	1120	1258
			domInteractive	26	15	99	20	23	83
			firstPaint	144	67	331	64	179	309
			backgroundConnect	218	196	286	11	222	233
			firstReactRender	14	8	29	4	16	26
			getState	42	18	109	18	47	94
			initialActions	1	0	5	1	1	2
			loadScripts	857	651	1190	104	911	1056
			setupStore	13	6	55	7	15	25
			numNetworkReqs	17	11	78	16	11	65
	Browserify	Power User Home	uiStartup	1726	1443	2297	177	1800	2088
			load	1055	892	1583	110	1114	1226
			domContentLoaded	1043	883	1529	107	1103	1219
			domInteractive	29	17	105	19	28	87
			firstPaint	164	68	1102	117	209	295
			backgroundConnect	243	200	570	62	246	425
			firstReactRender	14	11	25	2	15	19
			getState	171	128	297	33	189	232
			initialActions	1	0	4	1	1	2
			loadScripts	828	681	1304	105	889	1015
			setupStore	18	6	46	10	18	40
			numNetworkReqs	68	53	217	26	63	124
	Webpack	Standard Home	uiStartup	811	664	1114	88	852	1001
			load	653	587	885	65	685	787
			domContentLoaded	648	583	879	65	680	778
			domInteractive	25	16	142	20	22	78
			firstPaint	108	59	395	57	132	213
			backgroundConnect	24	5	112	25	34	95
			firstReactRender	16	10	40	5	18	25
			getState	35	14	124	17	46	60
			initialActions	1	0	4	1	1	4
			loadScripts	645	580	871	63	678	775
			setupStore	13	7	42	8	14	36
			numNetworkReqs	17	11	79	16	11	67
	Webpack	Power User Home	uiStartup	1151	913	1966	171	1217	1489
			load	705	590	904	78	731	872
			domContentLoaded	699	584	895	77	724	863
			domInteractive	30	16	120	24	25	99
			firstPaint	123	63	411	64	152	230
			backgroundConnect	58	7	560	114	55	476
			firstReactRender	15	12	23	2	16	19
			getState	135	78	203	15	139	160
			initialActions	1	0	2	0	1	1
			loadScripts	696	582	893	75	721	860
			setupStore	14	7	71	8	13	36
			numNetworkReqs	66	53	127	17	63	115
Firefox	Browserify	Standard Home	uiStartup	1371	1059	2046	196	1486	1704
			load	1096	909	1857	133	1170	1299
			domContentLoaded	1095	908	1857	133	1170	1299
			domInteractive	67	32	185	37	87	138
			firstPaint	-	-	-	-	-	-
			backgroundConnect	62	19	386	61	77	191
			firstReactRender	12	9	31	3	12	20
			getState	15	6	113	18	13	39
			initialActions	1	0	2	0	1	2
			loadScripts	1060	894	1837	120	1122	1201
			setupStore	16	5	173	22	13	61
			numNetworkReqs	19	9	77	19	13	73
	Browserify	Power User Home	uiStartup	2572	1544	3417	569	3049	3332
			load	1767	1028	2715	571	2308	2559
			domContentLoaded	1767	1027	2714	571	2308	2559
			domInteractive	108	34	952	143	89	314
			firstPaint	-	-	-	-	-	-
			backgroundConnect	343	24	1203	363	456	1154
			firstReactRender	21	12	74	10	25	46
			getState	110	61	491	51	123	198
			initialActions	2	1	8	1	2	3
			loadScripts	1526	1013	2468	493	2130	2367
			setupStore	21	5	149	25	22	74
			numNetworkReqs	75	52	178	31	83	164
	Webpack	Standard Home	uiStartup	1565	1293	2023	161	1652	1856
			load	1315	1126	1557	109	1391	1527
			domContentLoaded	1314	1126	1557	109	1391	1527
			domInteractive	78	24	176	37	106	139
			firstPaint	-	-	-	-	-	-
			backgroundConnect	61	17	209	42	77	144
			firstReactRender	15	11	79	9	15	22
			getState	15	6	118	19	12	37
			initialActions	1	0	3	1	2	2
			loadScripts	1276	1105	1531	97	1342	1442
			setupStore	17	5	230	26	12	63
			numNetworkReqs	19	9	85	18	13	73
	Webpack	Power User Home	uiStartup	2482	1586	3178	447	2860	3041
			load	1842	1074	2540	468	2289	2425
			domContentLoaded	1842	1074	2539	468	2288	2425
			domInteractive	66	32	308	51	68	224
			firstPaint	-	-	-	-	-	-
			backgroundConnect	231	24	1090	260	280	976
			firstReactRender	19	13	61	7	22	31
			getState	92	59	267	38	102	168
			initialActions	2	0	7	1	2	3
			loadScripts	1672	1059	2313	389	2043	2225
			setupStore	68	5	957	186	21	341
			numNetworkReqs	69	41	158	30	81	133

📊 Page Load Benchmark Results

Current Commit: 0bc73ce | Date: 1/7/2026

📄 Localhost MetaMask Test Dapp

Samples: 100

Summary

• pageLoadTime-> current mean value: 1.04s (±39ms) 🟡 | historical mean value: 1.04s ⬆️ (historical data)
• domContentLoaded-> current mean value: 726ms (±36ms) 🟢 | historical mean value: 725ms ⬆️ (historical data)
• firstContentfulPaint-> current mean value: 77ms (±10ms) 🟢 | historical mean value: 77ms ⬆️ (historical data)

📈 Detailed Results

Metric	Mean	Std Dev	Min	Max	P95	P99
pageLoadTime	1.04s	39ms	1.01s	1.32s	1.07s	1.32s
domContentLoaded	726ms	36ms	700ms	988ms	755ms	988ms
firstPaint	77ms	10ms	60ms	160ms	88ms	160ms
firstContentfulPaint	77ms	10ms	60ms	160ms	88ms	160ms
largestContentfulPaint	0ms	0ms	0ms	0ms	0ms	0ms

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 58 Bytes (0%)
• ui: 0 Bytes (0%)
• common: 20 Bytes (0%)

[metamaskbotv2]

Builds ready [bb192f4]

• builds: chrome, firefox
• builds (beta): chrome, firefox
• builds (flask): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• bundle size: Bundle Size Stats
• user-actions-benchmark: User Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
  • content-script: 0
  • offscreen: 0

UI Startup Metrics (1241 ± 125 ms)

Platform	BuildType	Page	Metric	Mean (ms)	Min (ms)	Max (ms)	Std Dev (ms)	P 75 (ms)	P 95 (ms)
Chrome	Browserify	Standard Home	uiStartup	1241	1011	1634	125	1314	1489
			load	1042	822	1374	120	1111	1278
			domContentLoaded	1035	815	1368	119	1105	1272
			domInteractive	23	15	112	18	19	77
			firstPaint	190	57	1294	236	184	1083
			backgroundConnect	197	173	233	12	205	222
			firstReactRender	14	8	33	5	15	25
			getState	33	18	69	11	39	55
			initialActions	1	0	3	1	1	2
			loadScripts	846	629	1169	121	921	1088
			setupStore	13	7	40	5	14	22
			numNetworkReqs	18	11	78	17	11	73
	Browserify	Power User Home	uiStartup	1890	1514	2547	198	2005	2339
			load	1026	886	1446	112	1056	1265
			domContentLoaded	1013	879	1438	113	1043	1253
			domInteractive	35	17	145	26	33	115
			firstPaint	189	73	1354	143	227	398
			backgroundConnect	272	203	769	134	231	632
			firstReactRender	21	15	49	7	22	42
			getState	181	134	740	82	185	222
			initialActions	1	0	3	1	1	2
			loadScripts	804	680	1235	112	837	1045
			setupStore	19	11	156	16	19	39
			numNetworkReqs	57	34	144	22	61	119
	Webpack	Standard Home	uiStartup	784	649	1049	75	813	961
			load	636	560	809	64	664	787
			domContentLoaded	631	556	803	63	658	782
			domInteractive	26	15	101	20	22	87
			firstPaint	103	61	329	50	122	219
			backgroundConnect	31	5	144	31	48	105
			firstReactRender	14	10	27	3	16	21
			getState	32	13	123	16	42	59
			initialActions	1	0	6	1	1	1
			loadScripts	628	554	794	62	655	774
			setupStore	12	6	45	8	13	37
			numNetworkReqs	18	11	76	18	11	73
	Webpack	Power User Home	uiStartup	1361	971	2040	244	1524	1917
			load	697	593	1008	92	712	946
			domContentLoaded	688	589	1002	93	702	939
			domInteractive	36	18	172	32	32	127
			firstPaint	138	63	445	80	164	335
			backgroundConnect	101	7	655	182	78	584
			firstReactRender	22	17	38	4	23	28
			getState	159	133	758	62	161	193
			initialActions	1	0	3	1	1	2
			loadScripts	684	586	992	91	699	930
			setupStore	15	8	63	7	17	19
			numNetworkReqs	73	38	233	41	81	150
Firefox	Browserify	Standard Home	uiStartup	1406	1094	2089	201	1505	1842
			load	1114	935	1901	151	1195	1349
			domContentLoaded	1113	935	1900	152	1194	1348
			domInteractive	81	32	932	98	95	183
			firstPaint	-	-	-	-	-	-
			backgroundConnect	58	16	262	50	67	169
			firstReactRender	12	9	25	3	12	17
			getState	15	6	205	25	12	42
			initialActions	1	0	2	1	2	2
			loadScripts	1078	915	1886	136	1131	1267
			setupStore	15	4	170	24	11	48
			numNetworkReqs	20	9	92	20	14	75
	Browserify	Power User Home	uiStartup	2482	1809	7976	786	2464	4382
			load	1262	993	5289	493	1239	1990
			domContentLoaded	1261	993	5288	493	1239	1990
			domInteractive	138	35	1000	150	121	400
			firstPaint	-	-	-	-	-	-
			backgroundConnect	125	26	1279	207	102	430
			firstReactRender	22	15	87	8	24	29
			getState	253	67	831	206	324	729
			initialActions	2	0	3	1	2	3
			loadScripts	1220	978	5258	478	1176	1865
			setupStore	127	9	768	181	113	611
			numNetworkReqs	72	29	257	49	104	178
	Webpack	Standard Home	uiStartup	1594	1216	2179	178	1722	1915
			load	1325	1111	1657	118	1405	1528
			domContentLoaded	1324	1110	1656	118	1405	1527
			domInteractive	78	27	208	38	96	144
			firstPaint	-	-	-	-	-	-
			backgroundConnect	68	20	294	55	87	182
			firstReactRender	15	11	57	7	16	26
			getState	16	8	213	21	15	29
			initialActions	1	0	2	1	2	2
			loadScripts	1284	1093	1526	104	1366	1474
			setupStore	26	3	210	38	18	120
			numNetworkReqs	20	9	82	19	13	75
	Webpack	Power User Home	uiStartup	2872	2158	4866	773	2896	4651
			load	1615	1228	3283	531	1765	2820
			domContentLoaded	1614	1227	3283	531	1765	2819
			domInteractive	118	30	963	143	105	549
			firstPaint	-	-	-	-	-	-
			backgroundConnect	178	22	1271	257	149	1034
			firstReactRender	25	15	123	16	28	59
			getState	276	70	810	224	418	778
			initialActions	2	0	3	1	2	3
			loadScripts	1510	1192	3108	433	1588	2708
			setupStore	113	7	565	130	158	457
			numNetworkReqs	58	28	186	43	51	174

📊 Page Load Benchmark Results

Current Commit: bb192f4 | Date: 1/8/2026

📄 Localhost MetaMask Test Dapp

Samples: 100

Summary

• pageLoadTime-> current mean value: 1.05s (±41ms) 🟡 | historical mean value: 1.05s ⬆️ (historical data)
• domContentLoaded-> current mean value: 730ms (±38ms) 🟢 | historical mean value: 730ms ⬇️ (historical data)
• firstContentfulPaint-> current mean value: 78ms (±10ms) 🟢 | historical mean value: 80ms ⬇️ (historical data)

📈 Detailed Results

Metric	Mean	Std Dev	Min	Max	P95	P99
pageLoadTime	1.05s	41ms	1.02s	1.35s	1.07s	1.35s
domContentLoaded	730ms	38ms	705ms	1.02s	751ms	1.02s
firstPaint	78ms	10ms	60ms	160ms	88ms	160ms
firstContentfulPaint	78ms	10ms	60ms	160ms	88ms	160ms
largestContentfulPaint	0ms	0ms	0ms	0ms	0ms	0ms

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 58 Bytes (0%)
• ui: 0 Bytes (0%)
• common: 20 Bytes (0%)