Update dark theme (thanks Onurtag)

Fix: error when the filename contains consecutive spaces

Fix: Pressing Enter adds the download as paused

Update locale: ru (thanks wvxwxvw)

Important changes for Firefox 75

Firefox 75 has removed an important functionality (IDBMutableFile) used by the extension. From version 3.2, the extension is forced to use another storage method to be compatible. The caveats are:

You will need to pause all tasks before exiting the browser. Otherwise, some progress will be lost depending on the extension parameters.
Existing downloads using the old method cannot be continued with the new method. If you are currently downloading a large file, it is suggested to wait for it to complete before upgrading Firefox.
Performance drops have not been noticed during tests, but they may vary with different system conditions and parameters.

This new storage method was first introduced in version 3.0 as an option. If you have set the storage API option to Segmented files, you can reset it to default in 3.2.

Change: the popups in options page are now more readable in dark theme
Update locale: ru (thanks wvxwxvw)

Add locale: pt-BR (thanks Mike-Reddick)

Add: search filename from the toolbar

Firefox is planning to remove the storage functionality used by this extension. This will affect the extension severely.

From version 3.0, a new storage method is implemented that only uses supported functions. The caveats are:

• You will need to pause all tasks before exiting the browser. Otherwise, some progress will be lost depending on the extension parameters.
• Existing downloads using the old method cannot be continued with the new method.
• Performance drops have not been noticed during tests, but they may vary with different system conditions and parameters.

This new method is not enabled by default yet. The options of choosing the storage method and the parameters have been added, if you want to test it now.

Fix: custom CSS does not work

Emergency fix: incompatibility with Firefox Nightly 74
Firefox Nightly 74 just removed an important function that the extension depends on.
This version is able to workaround this issue, but the performance of saving files will decrease.
Additionally, it is unknown whether Firefox will remove the whole mutableFile API in the near future. If so, the entire storage layer will need to be rewritten. It may or may not be possible to build this extension with acceptable performance then.
I'll see how things go and prepare workarounds if possible.

Add: automatically import from other extensions
Add option: Shorten extension tab title
Update locale: ru (thanks wvxwxvw)
Change: background color of selected task in dark theme
Change: if a third-party icon is selected, the extension tabs will use it.
Fix: invalid filename with colons causes download to fail on Linux
Fix: opening the panel in a new tab does not work when the sidebar is open
Fix: toolbar is truncated in sidebar
Fix: custom CSS is not loaded in private browsing windows

Add: select multiple tasks in download list and start/pause/remove them
Add option: Enable prompt for audio files
Add option: Enable prompt for video files
Fix: invalid filename causes download to fail
Fix: referrer overflows the window in new task dialog
Update locale: ru (thanks wvxwxvw)

Add option: Make extension dialogs always on top of browser windows
Add locale: ru

Add option: Remove failed tasks on browser start
Add toolbar button: Clear failed tasks

Fix: filename of attachments from 126.com

Fix: toolbar icon color

The extension icon color in about:config now follows the light/dark theme.

Add option: Remove the built-in download item when removing a task (selected by default)

Fix: filename lost when importing from built-in download