@-moz-document url-prefix("chrome:"), url("about:downloads") {
.downloadProgress {
    margin-inline-end: -40px !important;
}}

#main[current-view="detail"] {
    max-width: var(--section-width) !important;
}

(this.cleardownloadsbutton = {
            init(that) {
                var panel = this.panel = DownloadsPanel.panel;
                if (!panel)
                    return;
                panel.addEventListener("popupshowing", this);
                that.unloadlisteners.push("cleardownloadsbutton");
            },
            handleEvent(e) {
                var dh = DownloadsView.downloadsHistory;
                if (!dh) {
                    this.destructor();
                    return;
                }
                var style = "data:text/css;charset=utf-8," + encodeURIComponent(`
                    vbox#downloadsFooterButtons {
                        display: grid !important;
                        grid-template-columns: repeat(2, 1fr) !important;
                        grid-auto-rows: auto 1fr !important;
                        align-items: stretch !important;
                        grid-template-areas: "a a" "b c" !important;
                    }
                    vbox#downloadsFooterButtons > toolbarseparator:first-of-type {
                        grid-area: a !important;
                        align-self: start !important;
                    }
                    vbox#downloadsFooterButtons > #downloadsHistory {
                        grid-area: b !important;
                    }
                    vbox#downloadsFooterButtons > #ucf-cleardownloads-btn {
                        grid-area: c !important;
                    }
                    #downloadsFooterButtons > button {
                        margin: 0 !important;
                        -moz-box-flex: 1 !important;
                        -moz-box-pack: center !important;
                        -moz-box-align: center !important;
                    }
                    #downloadsFooterButtons.panel-footer.panel-footer-menulike > button {
                        margin-top: 4px !important;
                    }
                    #downloadsFooterButtons > #ucf-cleardownloads-btn[disabled="true"] {
                        pointer-events: none !important;
                    }
                `);
                windowUtils.loadSheetUsingURIString(style, windowUtils.USER_SHEET);
                var btn = this.btn = document.createXULElement("button");
                btn.id = "ucf-cleardownloads-btn";
                btn.className = "downloadsPanelFooterButton subviewbutton panel-subview-footer-button toolbarbutton-1";
                btn.setAttribute("label", "Очистить загрузки");
                btn.setAttribute("disabled", "true");
                dh.after(btn);
                btn.addEventListener("command", this);
                (this.handleEvent = e => {
                    this[e.type](e);
                })(e);
            },
            command(e) {
                DownloadsCommon.getData(window, true)
                .removeFinished();
                PlacesUtils.history.removeVisitsByFilter({
                    transition: PlacesUtils.history.TRANSITIONS.DOWNLOAD,
                }).catch(Cu.reportError);
                this.btn.disabled = true;
            },
            async setbutton() {
                var {_downloads} = await DownloadsCommon.getData(window, true)._promiseList;
                for (let download of _downloads) {
                    if (download.stopped && !(download.canceled && download.hasPartialData)) {
                        this.btn.disabled = false;
                        return;
                    }
                }
                this.btn.disabled = true;
            },
            popupshowing(e) {
                if (e.target != this.panel) return;
                this.setbutton();
                var list = DownloadsCommon.getData(window, true);
                list.addView(this);
                this.panel.addEventListener("popuphiding", e => {
                    if (e.target != this.panel) return;
                    list.removeView(this);
                }, { once: true });
            },
            onDownloadChanged(download) {
                this.setbutton();
            },
            onDownloadRemoved(download) {
                if (!this.btn.disabled)
                    this.setbutton();
            },
            destructor() {
                this.panel?.removeEventListener("popupshowing", this);
                this.btn?.removeEventListener("command", this);
            }
        }).init(this);

richlistitem.download-state .downloadTypeIcon[src] {
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
}
/* ***************************************************************** */

richlistitem.download-state .downloadTypeIcon:is([src$=".exe?size=32"],[src$=".exe?size=32&state=normal"]) {
    object-position: 32px 0 !important;
    background-image: url("chrome://branding/content/icon32.png") !important;
}

@-moz-document domain("youtube.com") {
  #hover-overlays {
    display: none !important;
  }
}