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163 <li><a href="manifest.html">Manifest Files</a></li> | |
164 <li><a href="match_patterns.html">Match Patterns</a></li> | |
165 </ul> | |
166 </li> | |
167 <li class="leftNavSelected">Permission Warnings</li> | |
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186 <div class="g-unit" id="gc-pagecontent"> | |
187 <div id="pageTitle"> | |
188 <h1 class="page_title">Permission Warnings</h1> | |
189 </div> | |
190 <!-- TABLE OF CONTENTS --> | |
191 <div id="toc"> | |
192 <h2>Contents</h2> | |
193 <ol> | |
194 <li> | |
195 <a href="#examples"> Examples of permission warnings </a> | |
196 <ol> | |
197 </ol> | |
198 </li><li> | |
199 <a href="#warnings"> Warnings and their triggers </a> | |
200 <ol> | |
201 </ol> | |
202 </li><li> | |
203 <a href="#nowarning"> Permissions that don't cause warnings </a> | |
204 <ol> | |
205 </ol> | |
206 </li><li> | |
207 <a href="#test"> Testing permission warnings </a> | |
208 <ol> | |
209 </ol> | |
210 </li><li> | |
211 <a href="#api">API</a> | |
212 <ol> | |
213 </ol> | |
214 </li> | |
215 </ol> | |
216 </div> | |
217 <!-- /TABLE OF CONTENTS --> | |
218 <!-- Standard content lead-in for experimental API pages --> | |
219 <!-- STATIC CONTENT PLACEHOLDER --> | |
220 <div id="static"><div id="pageData-name" class="pageData">Permission War
nings</div> | |
221 <div id="pageData-showTOC" class="pageData">true</div> | |
222 <!-- | |
223 NOTE: When this doc is updated, the online help should also be updated: | |
224 http://www.google.com/support/chrome_webstore/bin/answer.py?hl=en&answer=186213 | |
225 We should periodically look at | |
226 http://src.chromium.org/viewvc/chrome/trunk/src/chrome/app/generated_resources.g
rd?view=markup | |
227 to make sure that we're covering all messages. Search for | |
228 IDS_EXTENSION_PROMPT_WARNING | |
229 (e.g. IDS_EXTENSION_PROMPT_WARNING_BROWSING_HISTORY). | |
230 --> | |
231 <p> | |
232 To use most chrome.* APIs and extension capabilities, | |
233 your extension must declare its intent in the | |
234 <a href="manifest.html">manifest</a>, | |
235 often in the "permissions" field. | |
236 Some of these declarations | |
237 result in a warning when | |
238 a user installs your extension. | |
239 </p> | |
240 <p> | |
241 When you autoupdate your extension, | |
242 the user might see another warning | |
243 if the extension requests new permissions. | |
244 These new permissions might be new APIs that your extension uses, | |
245 or they might be new websites | |
246 that your extension needs access to. | |
247 </p> | |
248 <h2 id="examples"> Examples of permission warnings </h2> | |
249 <p> | |
250 Here's a typical dialog | |
251 that a user might see when installing an extension: | |
252 </p> | |
253 <img src="images/perms-hw1.png" width="410" height="193" alt="Permission warning
: 'It can: Access your data on api.flickr.com'"> | |
254 <p> | |
255 The warning about access to data on api.flickr.com | |
256 is caused by the following lines | |
257 in the extension's manifest: | |
258 </p> | |
259 <pre>"permissions": [ | |
260 <b>"http://api.flickr.com/"</b> | |
261 ], | |
262 </pre> | |
263 <p class="note"> | |
264 <b>Note:</b> | |
265 You don't see permission warnings when | |
266 you load an unpacked extension. | |
267 You get permission warnings only when you install an extension | |
268 from a <code>.crx</code> file. | |
269 </p> | |
270 <p> | |
271 If you add a permission to the extension when you autoupdate it, | |
272 the user might see a new permission warning. | |
273 For example, | |
274 assume you add a new site and the "tabs" permission | |
275 to the previous example: | |
276 </p> | |
277 <pre>"permissions": [ | |
278 "http://api.flickr.com/", | |
279 <b>"http://*.flickr.com/", | |
280 "tabs"</b> | |
281 ], | |
282 </pre> | |
283 <p> | |
284 When the extension autoupdates, | |
285 the increased permissions | |
286 cause the extension to be disabled | |
287 until the user re-enables it. | |
288 Here's the warning the user sees: | |
289 </p> | |
290 <img src="images/perms-hw2-disabled.png" width="814" height="30" alt="Warning te
xt: 'The newest version of the extension Hello World requires more permissions,
so it has been disabled. [Re-enable].'"> | |
291 <p> | |
292 Clicking the Re-enable button | |
293 brings up the following warning: | |
294 </p> | |
295 <img src="images/perms-hw2.png" width="412" height="220" alt="Permission warning
: 'It can: Access your data on api.flickr.com and flickr.com; Read and modify yo
ur browsing history'"> | |
296 <h2 id="warnings"> Warnings and their triggers </h2> | |
297 <p> | |
298 It can be surprising when adding a permission such as "tabs" | |
299 results in the seemingly unrelated warning | |
300 that the extension can access your browsing activity. | |
301 The reason for the warning is that | |
302 although the <code>chrome.tabs</code> API | |
303 might be used only to open new tabs, | |
304 it can also be used to see the URL that's associated | |
305 with every newly opened tab | |
306 (using their <a href="tabs.html#type-Tab">Tab</a> objects). | |
307 </p> | |
308 <p class="note"> | |
309 <b>Note:</b> | |
310 As of Google Chrome 7, | |
311 you no longer need to specify the "tabs" permission | |
312 just to call <code>chrome.tabs.create()</code> | |
313 or <code>chrome.tabs.update()</code>. | |
314 </p> | |
315 <p> | |
316 The following table lists the warning messages | |
317 that users can see, | |
318 along with the manifest entries | |
319 that trigger them. | |
320 </p> | |
321 <p> | |
322 </p><table> | |
323 <tbody><tr> | |
324 <th>Warning message</th> <th>Manifest entry that causes&nb
sp;it</th> <th>Notes</th> | |
325 </tr> | |
326 <tr> | |
327 <td style="font-weight:bold"> | |
328 <!-- IDS_EXTENSION_PROMPT_WARNING_FULL_ACCESS --> | |
329 Access all data on your computer and the websites you visit | |
330 </td> | |
331 <td> | |
332 "plugins" | |
333 </td> | |
334 <td> | |
335 The "plugins" permission is required by | |
336 <a href="npapi.html">NPAPI plugins</a>. | |
337 </td> | |
338 </tr> | |
339 <tr> | |
340 <td style="font-weight:bold"> | |
341 <!-- IDS_EXTENSION_PROMPT_WARNING_BOOKMARKS --> | |
342 Read and modify your bookmarks | |
343 </td> | |
344 <td> | |
345 "bookmarks" permission | |
346 </td> | |
347 <td> | |
348 The "bookmarks" permission is required by the | |
349 <a href="bookmarks.html"><code>chrome.bookmarks</code></a> module. | |
350 </td> | |
351 </tr> | |
352 <tr> | |
353 <td style="font-weight:bold"> | |
354 <!-- IDS_EXTENSION_PROMPT_WARNING_BROWSING_HISTORY --> | |
355 Read and modify your browsing history | |
356 </td> | |
357 <td> | |
358 <!-- HasEffectiveBrowsingHistoryPermission --> | |
359 "history" permission | |
360 </td> | |
361 <td> | |
362 <p> | |
363 The "history" permission is required by | |
364 <a href="history.html"><code>chrome.history</code></a>. | |
365 </p> | |
366 </td> | |
367 </tr> | |
368 <tr> | |
369 <td style="font-weight:bold"> | |
370 <!-- IDS_EXTENSION_PROMPT_WARNING_TABS --> | |
371 Access your tabs and browsing activity | |
372 </td> | |
373 <td> | |
374 <!-- HasEffectiveBrowsingHistoryPermission --> | |
375 Any of the following: | |
376 <ul> | |
377 <li> "tabs" permission </li> | |
378 <li> "webNavigation" permission </li> | |
379 </ul> | |
380 </td> | |
381 <td> | |
382 <p> | |
383 The "tabs" permission is required by the | |
384 <a href="tabs.html"><code>chrome.tabs</code></a> and | |
385 <a href="windows.html"><code>chrome.windows</code></a> modules. | |
386 </p> | |
387 <p> | |
388 The "webNavigation" permission is required by the | |
389 <a href="webNavigation.html"><code>chrome.webNavigation</code></a> module. | |
390 </p> | |
391 </td> | |
392 </tr> | |
393 <tr> | |
394 <td style="font-weight:bold"> | |
395 <!-- IDS_EXTENSION_PROMPT_WARNING_CONTENT_SETTINGS --> | |
396 Manipulate settings that specify whether websites can use features such as c
ookies, JavaScript, and plug-ins | |
397 </td> | |
398 <td> | |
399 <!-- HasEffectiveBrowsingHistoryPermission --> | |
400 "contentSettings" permission | |
401 </td> | |
402 <td> | |
403 <p> | |
404 The "contentSettings" permission is required by | |
405 <a href="contentSettings.html"><code>chrome.contentSettings</code></a>. | |
406 </p> | |
407 </td> | |
408 </tr> | |
409 <tr> | |
410 <td style="font-weight:bold"> | |
411 <!-- IDS_EXTENSION_PROMPT_WARNING_ALL_HOSTS --> | |
412 Access your data on all websites | |
413 </td> | |
414 <td> | |
415 <!-- HasEffectiveAccessToAllHosts() --> | |
416 Any of the following: | |
417 <ul> | |
418 <li> "debugger" permission </li> | |
419 <li> "proxy" permission </li> | |
420 <li> A match pattern in the "permissions" field | |
421 that matches all hosts </li> | |
422 <li> A "content_scripts" field with a "matches" entry | |
423 that matches all hosts </li> | |
424 <li> "devtools_page" </li> | |
425 </ul> | |
426 </td> | |
427 <td> | |
428 <p> | |
429 The "debugger" permission is required by the experimental | |
430 <a href="experimental.debugger.html">debugger</a> module. | |
431 </p> | |
432 <p> | |
433 The "proxy" permission is required by the | |
434 <a href="proxy.html"><code>chrome.proxy</code></a> module. | |
435 </p> | |
436 <p> | |
437 Any of the following URLs match all hosts: | |
438 </p> | |
439 <ul> | |
440 <li> <code>http://*/*</code> </li> | |
441 <li> <code>https://*/*</code> </li> | |
442 <li> <code>*://*/*</code> </li> | |
443 <li> <code><all_urls></code> </li> | |
444 </ul> | |
445 </td> | |
446 </tr> | |
447 <tr> | |
448 <td style="font-weight:bold"> | |
449 <!-- IDS_EXTENSION_PROMPT_WARNING_?_HOST --> | |
450 <!-- IDS_EXTENSION_PROMPT_WARNING_4_OR_MORE_HOSTS --> | |
451 Access your data on <em>{list of websites}</em> | |
452 </td> | |
453 <td> | |
454 A match pattern in the "permissions" field | |
455 that specifies one or more hosts, | |
456 but not all hosts | |
457 </td> | |
458 <td> | |
459 <p> | |
460 Up to 3 sites are listed by name. | |
461 Subdomains aren't treated specially. | |
462 For example, <code>a.com</code> and <code>b.a.com</code> | |
463 are listed as different sites. | |
464 </p> | |
465 <p> | |
466 On autoupdate, | |
467 the user sees a permission warning | |
468 if the extension adds or changes sites. | |
469 For example, going from <code>a.com,b.com</code> | |
470 to <code>a.com,b.com,c.com</code> | |
471 triggers a warning. | |
472 Going from <code>b.a.com</code> | |
473 to <code>a.com</code>, | |
474 or vice versa, | |
475 also triggers a warning. | |
476 </p> | |
477 </td> | |
478 </tr> | |
479 <tr> | |
480 <td style="font-weight:bold"> | |
481 <!-- IDS_EXTENSION_PROMPT_WARNING_ALL_PAGES_CONTENT --> | |
482 Access the content of pages you visit | |
483 </td> | |
484 <td> | |
485 "pageCapture" permission | |
486 </td> | |
487 <td> | |
488 The "pageCapture" permission is required by the | |
489 <a href="pageCapture.html"><code>chrome.pageCapture</code></a> module. | |
490 </td> | |
491 </tr> | |
492 <tr> | |
493 <td style="font-weight:bold"> | |
494 <!-- IDS_EXTENSION_PROMPT_WARNING_MANAGEMENT --> | |
495 Manage your apps, extensions, and themes | |
496 </td> | |
497 <td> | |
498 "management" permission | |
499 </td> | |
500 <td> | |
501 The "management" permission is required by the | |
502 <a href="management.html"><code>chrome.management</code></a> module. | |
503 </td> | |
504 </tr> | |
505 <tr> | |
506 <td style="font-weight:bold"> | |
507 <!-- IDS_EXTENSION_PROMPT_WARNING_GEOLOCATION --> | |
508 Detect your physical location | |
509 </td> | |
510 <td> | |
511 "geolocation" permission | |
512 </td> | |
513 <td> | |
514 Allows the extension to use the proposed HTML5 | |
515 <a href="http://dev.w3.org/geo/api/spec-source.html">geolocation API</a> | |
516 without prompting the user for permission. | |
517 </td> | |
518 </tr> | |
519 <tr> | |
520 <td style="font-weight:bold"> | |
521 <!-- IDS_EXTENSION_PROMPT_WARNING_CLIPBOARD--> | |
522 Access data you copy and paste | |
523 </td> | |
524 <td> | |
525 "clipboardRead" permission | |
526 </td> | |
527 <td> | |
528 Allows the extension to use the following editing commands with | |
529 <code>document.execCommand()</code>: | |
530 <ul> | |
531 <li> <code>"copy"</code> </li> | |
532 <li> <code>"cut"</code> </li> | |
533 </ul> | |
534 </td> | |
535 </tr> | |
536 <tr> | |
537 <td style="font-weight:bold"> | |
538 <!-- IDS_EXTENSION_PROMPT_WARNING_PRIVACY--> | |
539 Manipulate privacy-related settings | |
540 </td> | |
541 <td> | |
542 "privacy" permission | |
543 </td> | |
544 <td> | |
545 The "privacy" permission is required by the | |
546 <a href="privacy.html"><code>chrome.privacy</code></a> module. | |
547 </td> | |
548 </tr> | |
549 <tr> | |
550 <td style="font-weight:bold"> | |
551 <!-- IDS_EXTENSION_PROMPT_WARNING_TTS_ENGINE--> | |
552 Access all text spoken using synthesized speech | |
553 </td> | |
554 <td> | |
555 "ttsEngine" permission | |
556 </td> | |
557 <td> | |
558 The "ttsEngine" permission is required by the | |
559 <a href="ttsEngine.html"><code>chrome.ttsEngine</code></a> module. | |
560 </td> | |
561 </tr> | |
562 </tbody></table> | |
563 <p></p> | |
564 <h2 id="nowarning"> Permissions that don't cause warnings </h2> | |
565 <p> | |
566 The following permissions don't result in a warning: | |
567 </p> | |
568 <ul> | |
569 <li>"browsingData"</li> | |
570 <li>"chrome://favicon/"</li> | |
571 <li>"clipboardWrite"</li> | |
572 <li>"contextMenus"</li> | |
573 <li>"cookies"</li> | |
574 <li>"experimental"</li> | |
575 <li>"idle"</li> | |
576 <li>"notifications"</li> | |
577 <li>"storage"</li> | |
578 <li>"unlimitedStorage"</li> | |
579 <li>"webRequest"</li> | |
580 <li>"webRequestBlocking"</li> | |
581 </ul> | |
582 <h2 id="test"> Testing permission warnings </h2> | |
583 <p> | |
584 If you'd like to see exactly which warnings your users will get, | |
585 <a href="packaging.html">package your extension</a> | |
586 into a <code>.crx</code> file, | |
587 and install it. | |
588 </p> | |
589 <p> | |
590 To see the warnings users will get when your extension is autoupdated, | |
591 you can go to a little more trouble | |
592 and set up an autoupdate server. | |
593 To do this, first create an update manifest | |
594 and point to it from your extension, | |
595 using the "update_url" key | |
596 (see <a href="autoupdate.html">Autoupdating</a>). | |
597 Next, <a href="packaging.html">package the extension</a> | |
598 into a new <code>.crx</code> file, | |
599 and install the app from this <code>.crx</code> file. | |
600 Now, change the extension's manifest to contain the new permissions, | |
601 and <a href="packaging.html#update">repackage the extension</a>. | |
602 Finally, update the extension | |
603 (and all other extensions that have outstanding updates) | |
604 by clicking the <b>chrome://extensions</b> page's | |
605 <b>Update extensions now</b> button. | |
606 </p> | |
607 <h2 id="api">API</h2> | |
608 <p> | |
609 You can get a list of permission warnings for any manifest with | |
610 <a href="management.html#method-getPermissionWarnings">chrome.management.getPerm
issionWarnings()</a>. | |
611 </p> | |
612 </div> | |
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