To run a short-lived command and return stdout
The Subprocess module can also start long-running process and
communicate with them, but we'll implement something different for that
if we need it.
(And update the en-US version with some strings that we don't use but
might if we updated to a slightly newer version of the updater before
they got rid of the dedicated update window)
If the file wasn't an XPI at all, or it didn't contain valid metadata for fx102,
the error message would previously show "%S" where the add-on name should be.
Now we fall back to the file path.
So a custom build doesn't have to modify each .ftl file
`app-name` is redundant with the Firefox strings, but it's what we used
previously and is easier to remember.
`nsIWebProgressListener.onStateChange()` gets called twice at the end of
requests, once with `stateFlags` set to `327696` and once with it set to
`262160`, which corresponds to `STATE_STOP + STATE_IS_NETWORK +
STATE_IS_REQUEST` and `STATE_STOP + STATE_IS_NETWORK`. httpd.js debug
logging shows that the connection is closed between the two calls. In
WebProgressFinishListener, we were previously calling `onFinish` after
the first one, but in Zotero 7, at least on Linux (or maybe just on
slower machines due to a race condition), the file from `saveURI()`
doesn't appear to be reliably written after the first call, causing
`Attachments.downloadFile()` to fail in `_enforcePDF()` due to an empty
file.
This changes WebProgressFinishListener to wait until the second
`STATE_STOP` call. We'll have to confirm whether this is the
state-change pattern for all requests, but it fixes our Find Available
PDF tests in CI.
https://firefox-source-docs.mozilla.org/dom/ioutils_migration.html
This also fixes a bug when `getContentsAsync()` is passed an
`nsIInputStream` or `nsIChannel` where raw bytes were returned instead
of a string. Not sure if we're doing that anywhere. If we are, this
would presumably break that code, but the function is supposed to return
a decoded string.
From some 2017-era langpacks I had downloaded. These strings aren't in
current langpacks, which use a different update mechanism, but we're
bundling a modified version of updates.xhtml from Firefox.
