Firefox web extensions download file set location

#Firefox web extensions download file set location how to
#Firefox web extensions download file set location free

To add the file or blob you want the native application to process use JSON.stringify(). The browser closes the native application after receiving any message back from the native application. Here you use ndNativeMessage() to send a JSON message to a new, temporary instance of the native application. The native application is opened if it is not running when nnectNative() is called and the application remains running until the extension calls Port.disconnect() or the page that connected to it is closed. Using the onMessage.addListener() function of Port you can listen for messages from the native application.

You can then pass a JSON message to the native application using the postMessage() function of Port. Here you trigger the process with nnectNative(), which returns a runtime.Port object. You have two options: Connection-based messaging Where you have a native app or want to deliver additional native features for file processing, use native messaging to pass a file to a native app for processing. It is therefore good practice to remove any revoked blob URLs from generated HTML elements when the blob URL is revoked. For example, if the blob URL was used as the SRC attribute of an IMG tag, the image will not load and will not be visible. Once the blob URL has been revoked, any attempt to load it will result in an error. If the URL is created in an extension's page (new tab, popup, or sidebar) the memory is released when the page is closed, but it is still a good practice to revoke the URL when it is no longer needed. If the URL was created in an extension's background page, this is not unloaded until the extension is disabled, uninstalled, or reloaded, so holding this memory unnecessarily could affect browser performance. If this is not done, the memory will not get returned until the page on which it was created is closed.

#Firefox web extensions download file set location free

This enables the garbage collector to free the memory allocated to the URL. Note the use of URL.revokeObjectURL() to explicitly revoke the blob URL. Again, getFileStorage() opens the 'stored-images' database then imagesStore.remove() removes each image from the filtered list of images. RemoveStoredImages() is called when the user clicks delete in the navigate collection page. The workings of the library can be understood by viewing image-store.js in /utils/: Creating the store and saving the imagesДЄsync function saveCollectedBlobs ( collectionName, collectedBlobs ) A toolbar button ( browserAction) opens a navigate collection page, on which the user can view and delete saved images, with a filter option to narrow choices. Selected images are collected in a popup and can be saved to a named collection. The Store Collected Images example lets users add images to a collection using an option on the image context menu. (IDBMutableFile is not included, but you can find examples in the idb-file-storage examples along with a number of other examples of the library in action).

#Firefox web extensions download file set location how to

The Store Collected Images example illustrates how to use most of these features. remove to delete a file or blob from the database.get to retrieve a file or blob from the database.put to add a file or blob to the database.

list to obtain an optionally filtered list of file in the database.Provides the methods to save and retrieve files, such as: Returns an IDBFileStorage instance, creating the named storage if it does not exist. The key features of the library are: getFileStorage (The IDBMutableFile API enables extensions to create and persist an IndexedDB database file object that provides an API to read and change the file's content without loading all the file into memory.) On Firefox, this library also provides a Promise-based API wrapper for the non-standard IDBMutableFile API. If your extension needs to save files locally, the idb-file-storage library provides a simple Promise-based wrapper to the IndexedDB API to aid the storage and retrieval of files and blobs. Differences between API implementations.