--- # Scope: # * Explain browser compatibility of CKEditor 5. # * Document known compatibility issues and missing features. # * Discuss support for mobile environments. category: builds-support order: 10 --- # Browser compatibility ## Desktop environment CKEditor 5 is currently supported in the following desktop browsers: * Full support (see [notes below](#notes)): * Chrome (latest stable release). * Firefox (latest stable release). * Safari (latest stable release). * Opera (latest stable release). * Electron (latest stable release). * Good support: * Edge (latest stable release). Known issues: * Minor issues with selection: [1](https://github.com/ckeditor/ckeditor5-engine/issues/974), [2](https://github.com/ckeditor/ckeditor5-engine/issues/928). * The editor becomes unstable when F12 developer tools are enabled. Not supported yet: * Internet Explorer 11. See the [Compatibility with IE11](https://github.com/ckeditor/ckeditor5/issues/330) ticket. ### Notes Features known to not be fully supported yet: * Text composition. Input Method Engine (IME) is a mechanism that allows the users to input text in languages such as Japanese and Chinese. This mechanism is not fully supported yet and we will be polishing that feature in a close future. * Drag and drop inside the editor does not work yet. It is possible to drop images from your system if the {@link module:image/imageupload~ImageUpload} feature is enabled. ## Mobile environment CKEditor 5 is currently supported in the following mobile environments: * Android (all vendor-supported versions) * iOS (all vendor-supported versions) * Android WebView * iOS WebView (UIWebView and WKWebView) ## Quality assurance To ensure the highest quality, we maintain a complete test suite with a stable 100% of code coverage for each of the packages. As of April 2018, this means over 8200 tests and the number is growing. Such an extensive test suite requires a proper continuous integration service. We use [Travis CI](https://travis-ci.com/) as a build platform and [BrowserStack](https://www.browserstack.com/) to be able to run tests on all browsers. These services ensure seamless and fast developer experience and allow us to focus on the job.