Feature Policy
This specification defines a mechanism that allows developers to selectively enable and disable use of various browser features and APIs. Feature Policy is deprecated and has been replaced with Permissions Policy and Document Policy.
Unofficial / Note: https://www.w3.org/TR/2019/WD-feature-policy-1-20190416/
Usage: 78.6% + 18.5% = 97.1%
Support summary
- IE: Not supported
- Edge: 79, notes for version 884
- Firefox: partial since 74, notes for version 742
- Chrome: 74, partial since 60, notes for version 601, notes for version 884
- Safari: partial since 11.1, notes for version 11.12
- Opera: 62, partial since 47, notes for version 471, notes for version 754
- Safari on iOS: partial since 11.3-11.4, notes for version 11.3-11.42
- Opera Mini: Not supported
- Android Browser: 145
- Blackberry Browser: Not supported
- Opera Mobile: Not supported, notes for version 804
- Chrome for Android: Not supported, notes for version 1454
- Firefox for Android: partial since 147, notes for version 1472
- IE Mobile: Not supported
- UC Browser for Android: 15.5
- Samsung Internet: 11.1-11.2, partial since 8.2, notes for version 8.21
- QQ Browser: partial since 14.9, notes for version 14.91
- Baidu Browser: Not supported, notes for version 13.524
- KaiOS Browser: partial since 3.0-3.1, notes for version 3.0-3.12
Notes
Standard support includes the HTTP `Feature-Policy` header, `allow` attribute on iframes and the `document.featurePolicy` JS API.
- Older Chromium browsers did not support the JS API.
↑
- Safari and Firefox only supports the `allow` attribute on iframes.
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- Safari doesn't support a list of origins or a wildcard.
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- At least partially supports Permissions Policy, the main replacement for this spec.
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Links
Full support table
IE
Edge
| 12 | 13 | 14 | 15 | 16 | 17 | 18 | 79 | 80 | 81 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 |
|---|
| n | n | n | n | n | n | n | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y |
Firefox
| 2 | 3 | 3.5 | 3.6 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 |
|---|
| n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a |
Chrome
| 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 |
|---|
| n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | a | a | a | a | a | a | a | a | a | a | a | a | a | a | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y |
Safari
| 3.1 | 3.2 | 4 | 5 | 5.1 | 6 | 6.1 | 7 | 7.1 | 8 | 9 | 9.1 | 10 | 10.1 | 11 | 11.1 | 12 | 12.1 | 13 | 13.1 | 14 | 14.1 | 15 | 15.1 | 15.2-15.3 | 15.4 | 15.5 | 15.6 | 16.0 | 16.1 | 16.2 | 16.3 | 16.4 | 16.5 | 16.6 | 17.0 | 17.1 | 17.2 | 17.3 | 17.4 | 17.5 | 17.6 | 18.0 | 18.1 | 18.2 | 18.3 | 18.4 | 18.5-18.7 | 26.0 | 26.1 | 26.2 | 26.3 | 26.4 | TP |
|---|
| n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a |
Opera
| 9 | 9.5-9.6 | 10.0-10.1 | 10.5 | 10.6 | 11 | 11.1 | 11.5 | 11.6 | 12 | 12.1 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 60 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 |
|---|
| n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | n | a | a | a | a | a | a | a | a | a | a | a | a | a | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y |
Safari on iOS
| 3.2 | 4.0-4.1 | 4.2-4.3 | 5.0-5.1 | 6.0-6.1 | 7.0-7.1 | 8 | 8.1-8.4 | 9.0-9.2 | 9.3 | 10.0-10.2 | 10.3 | 11.0-11.2 | 11.3-11.4 | 12.0-12.1 | 12.2-12.5 | 13.0-13.1 | 13.2 | 13.3 | 13.4-13.7 | 14.0-14.4 | 14.5-14.8 | 15.0-15.1 | 15.2-15.3 | 15.4 | 15.5 | 15.6-15.8 | 16.0 | 16.1 | 16.2 | 16.3 | 16.4 | 16.5 | 16.6-16.7 | 17.0 | 17.1 | 17.2 | 17.3 | 17.4 | 17.5 | 17.6-17.7 | 18.0 | 18.1 | 18.2 | 18.3 | 18.4 | 18.5-18.7 | 26.0 | 26.1 | 26.2 | 26.3 | 26.4 |
|---|
| n | n | n | n | n | n | n | n | n | n | n | n | n | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a |
Opera Mini
Android Browser
| 2.1 | 2.2 | 2.3 | 3 | 4 | 4.1 | 4.2-4.3 | 4.4 | 4.4.3-4.4.4 | 145 |
|---|
| n | n | n | n | n | n | n | n | n | y |
Blackberry Browser
Opera Mobile
| 10 | 11 | 11.1 | 11.5 | 12 | 12.1 | 80 |
|---|
| n | n | n | n | n | n | y |
Chrome for Android
Firefox for Android
IE Mobile
UC Browser for Android
Samsung Internet
| 4 | 5.0-5.4 | 6.2-6.4 | 7.2-7.4 | 8.2 | 9.2 | 10.1 | 11.1-11.2 | 12.0 | 13.0 | 14.0 | 15.0 | 16.0 | 17.0 | 18.0 | 19.0 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
|---|
| n | n | n | n | a | a | a | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y | y |
QQ Browser
Baidu Browser
KaiOS Browser
- y = supported
- a = partially supported, see notes
- x = supported with a prefix, e.g. moz, webkit
- p = supported with a polyfill
- d = available but disabled by default; the feature need to be enabled in about:config, chrome://flags, etc.
- n = not supported
- u = unknown/untested
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